Its a Facebook raid, conducted on July 12th against an independent Vietnamese news site called the Khmer Krom News. The strategy is simple — rack up enough abuse reports to knock the site off Facebook, effectively cutting it off from its audience. This isnt the first time activists have run into trouble on Facebook. The button is designed to protect Facebook users from the same threats and abuse that often run rampant on Twitter and Tumblr, but as the raid shows, that protection can also be used as a tool for stifling dissent.