"Wikipedia shut down its Russian-language page on Tuesday to protest at a bill that would boost government control over the internet amid a crackdown on those opposed to the regime of President Vladimir Putin. The Russian justice ministry already maintains a register of more than 1,000 sites that have been deemed "extremist" and ordered to be shut down..."
http://www.guardian.co.uk/world/2012/jul/10/russian-wikipedia-shut-down-protest