It seems like the quality of comment posts is declining. Are you doing anything about it?
We have a moderation system.
One of the unfortunate side-effects of the increasing popularity of _insert_name_of_any_disucussion_server_ is that the number of trolls, flame-warriors and all-around lamers increases as well, and it only takes a relatively small number of them to make a lot of noise. Keeping this noise to a minimum is one of the primary goals of the moderation system.
Since this system is essentially an experiment in trying to solve the problems inherent in mass communication, one would expect its success to be variable, and indeed, this is the case. Some days it works great, and some days it doesn't.

How did the moderation system develop?
In order to understand the system, it might help to understand how we got there. It wasn't random, it was trial and error and progression. I'm constantly tweaking and changing, trying to squeeze more out. Trying to make a more efficient, more fair system.

Before Moderation

In the beginning, Slashdot was small. We got dozens of posts each day, and it was good. The signal was high, the noise was low. Moderation was unnecessary because we were nobody. It was a different world then. Each day we grew, adding more and more users, and increasing the number of comments submitted. As this happened, many users discovered new and annoying ways to abuse the system. The authors had but one option: Delete annoying comments. But as the system grew, we knew that we would never be able to keep up. We were outnumbered.

Hand Picked Few

So, I picked people to help. Just a few. 25 or so at the end. They were given the simple ability to add or subtract points to comments. The primary function of these brave souls was to weed out spam and First Post and flame bait. Plus, when they found smart stuff, to bring it out.

The system worked pretty well, but as Slashdot continued to grow, it was obvious that these 25 people wouldn't be enough to keep up with the thousands of posts we were getting each day. It was obvious that we needed more.

400 Lucky Winners

So we picked more the only way we could. Using the actions of the original 25 moderators, we picked 400 more. We picked the 400 people who had posted good comments: comments that had been flagged as the cream of Slashdot. Immediately several dozen of these new moderators had their access revoked for being abusive, but they settled down.

At this time I began to experiment with ways of restricting the power of moderators to prevent abuses. 25 people are easy to keep an eye on, but 400 is another matter. I knew that someday I would have even less control since I intended to eventually give access to even more people. While moderators still added and subtracted points, the number of points they were given dropped from hundreds to dozens.

As time went on, I began working on the next phase: mass moderation. I learned a lot from having so many moderators. I learned that I needed to limit the power of each person to prevent a single rogue from spoiling it for everyone. And then we took the next step.

Today: Most Anyone

Today any regular Slashdot reader is probably eligible to become a moderator. A variety of factors weigh into it, but if you are logged in when you browse Slashdot comments, you might occasionally be granted moderator access. Don't worry about it. Just keep reading this document and learn what to do about it!

How does moderation work?
When moderators are given access, they are given a number of points of influence to play with. Each comment they moderate deducts a point. When they run out of points, they are done serving until next time it is their turn.

Moderation takes place by selecting an adjective from a drop down list that appears next to comments containing descriptive words like "Flamebait" or "Informative." Bad words will reduce the comment's score by a single point, and good words increase a comment's score by a single point. All comments are scored on an absolute scale from -1 to 5. Logged-in users start at 1 (although this can vary from 0 to 2 based on their karma) and anonymous users start at 0.

Moderators can not participate in the same discussion as both a moderator and a poster. This is to prevent abuses, and while it is one of the more controversial aspects of the system, I'm sticking to it. There are enough lurkers that moderate that, if you want to post, feel free.

Moderation points expire after 3 days if they are left unused. You then go back into the pool and might someday be given access again.

Concentrate more on promoting than on demoting. The real goal here is to find the juicy good stuff and let others read it. Do not promote personal agendas. Do not let your opinions factor in. Try to be impartial about this. Simply disagreeing with a comment is not a valid reason to mark it down. Likewise, agreeing with a comment is not a valid reason to mark it up. The goal here is to share ideas. To sift through the haystack and find needles. And to keep the children who like to spam Slashdot in check.

What are thresholds?
Your "threshold" is the minimum score that a comment needs to have if it is to be displayed to you. Comments are scored from -1 to 5, and you can set your threshold at any score within that range. So, for example, if you set your threshold at 2, only comments with scores of 2 or above would be displayed. Setting your threshold at -1 will display all comments. 0 is almost all comments. 1 filters out most Anonymous Cowards, and so on. Higher threshold settings reduce the number of comments you see, but (in theory, anyway) the quality of the posts you do see increases.

Is this censorship?
I don't think so. Nothing is deleted: if you want to read the raw, uncut Slashdot, simply set your threshold to -1 and go crazy! This system is simply a method for us to try to work together to categorize the thousands of comments that are posted each day in such a way that we can benefit from the wisdom contained in the discussions. It's in there! It just takes some work to find it.

What is a good comment? A bad comment?
A good comment says something interesting or insightful. It has a link to a relevant piece of information that will add something to the discussion. It might not be Shakespeare, but it's not Beavis and Butthead. It's not off topic or flamey. It doesn't call someone names. It doesn't personally attack someone because of a disagreement of opinion.

What about comments copy-and-pasted from other sources?
If someone copies text from elsewhere and doesn't mention that it's copied or name the source, it's plagiarism. Moderate it Redundant, or feel free to alert moderators by posting a link (perhaps anonymously).

What do the choices in the moderation drop-down boxes mean?
* Normal -- This is the default setting attached to every comment when you have moderation privileges. Normally, you should not need to actually select this option, but if your mouse slips and you accidentally moderate up or down a comment you didn't mean to, you can undo that mistake by choosing Normal before you hit the "Moderate" button.
* Offtopic -- A comment which has nothing to do with the story it's linked to (song lyrics, obscene ascii art, comments about another topic entirely) is Offtopic.
* Flamebait -- Flamebait refers to comments whose sole purpose is to insult and enrage. If someone is not-so-subtly picking a fight (racial insults are a dead giveaway), it's Flamebait.
* Troll -- A Troll is similar to Flamebait, but slightly more refined. This is a prank comment intended to provoke indignant (or just confused) responses. A Troll might mix up vital facts or otherwise distort reality, to make other readers react with helpful "corrections." Trolling is the online equivalent of intentionally dialing wrong numbers just to waste other people's time.
* Redundant -- Redundant posts are ones which add no new information, but instead take up space with repeating information either in the Slashdot post, the attached links, or lots of previous comments. For instance, some posters cut and paste otherwise legitimate comments in multiple places in the same discussion; the pasted versions are Redundant.
* Insightful -- An Insightful statement makes you think, puts a new spin on a given story (or aspect of a story). An analogy you hadn't thought of, or a telling counterexample, are examples of Insightful comments.
* Interesting -- If you believe a comment to be Interesting (and it's not mostly Redundant, Offtopic, or otherwise lame), it is.
* Informative -- Often comments add new information to explain the circumstances hinted at by a particular story, fill in "The Other Side" of an argument, provide specifications to a product described too vaguely elsewhere, etc. Such comments are Informative.
* Funny -- Think of Funny as being a good moderation choice if you actually think the comment is funny, not just because it seems intended to be. Not every knock-knock joke is Funny.
* Overrated -- Sometimes you'll run into a comment which for whatever reason has been moderated out of proportion -- this probably means several moderators saw it at nearly the same time, thought it was Funny, Insightful etc, and their scores added together exaggerate its relative merit. (A knock-knock joke at +5, Funny) Such a comment is Overrated. It's not knocking the original poster to say so, but it's probably better to spend your mod points on comments which are deserving of being moderated up.
* Underrated -- Likewise, some comments get smashed lower than they perhaps deserve by overzealous moderators. If you moderate a comment as Underrated, you're saying that it deserves to be read by more people than will see it at its current score. As with Overrated, if you can think of a more specific moderation reason, do so -- if a comment has already been moderated with an appropriate label though, and you just want to indicate that it deserves greater visibility, that's what Underrated is for. However, if a comment is labeled with a fitting (negative) label, choosing Underrated isn't such a great idea, because you could end up with contradictions like "+5, Flamebait."

Moderation seems restrictive. Is it really necessary?
In short, yes.
As you might have noticed, Slashdot gets a lot of comments. Thousands a day. Tens of thousands a month. At any given time, the database holds 50,000+ comments. A single story might have a thousand replies- and let's be realistic: Not all of the comments are that great. In fact, some are down right terrible, but others are truly gems.

The moderation system is designed to sort the gems and the crap from the steady stream of information that flows through the pipe. And wherever possible, it tries to make the readers of the site take on the responsibility.

The goal is that each reader will be able to read Slashdot at a level that they find appropriate. The impatient can read nothing at all but the original stories. Some will only want to read the highest rated of comments, some will want to eliminate anonymous posts, and others will want to read every last drip of data, from the First Posts! to the spam. The system we've created here will make that happen. Or at least, it sure will try...

Goals

* Promote quality, discourage crap.
* Make Slashdot as readable as possible for as many people as possible.
* Do not require a huge amount of time from any single moderator.
* Do not allow a single moderator a "reign of terror."

On the whole, we think the moderation system works really well, but often people disagree. Their disagreement usually stems from different expectations. They see a bunch of moderations countering each other. They see a comment moderated blatantly wrong. A 'Troll' flagged 'Off topic' (or vice versa) and feel that the system is flawed.
Of course it is flawed! It's built upon the efforts of diverse human beings volunteering their time to help! Some humans are selfish and destructive. Others work hard and fair. It's my opinion that the sum of all their efforts is pretty damn good.
Read Slashdot at a threshold of 3 and behold the quality of the comments you read. Certainly you aren't reading a wild and freewheeling discussion anymore, but you are reading many valid points from many intelligent people. I am actually pretty amazed.

http://slashdot.org/faq/com-mod.shtml