I was searching for any event or gathering concerning censorship in China when I came across an interesting article. Last Friday marked the 21st year since the massacre at Tienanmen Square in Beijing. As the events of early June 1989 are denied by the government, commemorating the anniversary openly was out of the question. However, many individuals used the social network Foursquare as a sort of virtual gathering. The network allows for friends to "check in" with their location; on Friday, many were checking in from Tienanmen Square.
No physical demonstration, but even a virtual gathering caught the government's sensitive eye. The virtual gathering did not sit well with the government, who blocked Foursquare before the day was through.