ZD NETReports are coming in that Facebook has been hacked: users are seeing images depicting pornography, acts of violence, self-mutilation, and bestiality. Some are already blaming Anonymous.The problem supposedly started two or three days ago, but seems to be escalating dramatically
some members of the social network are complaining about violent and/or pornographic pictures showing up in their News Feeds without their knowledge that they have allegedly Liked. Others are being told by their friends that they are sending requests to click on links to videos, sending out bogus chat messages, or writing mass messages and tagged photos leading people to believe they are in the link.
There is no proof that Anonymous is behind this flood of inappropriate images and links (normally such an attack would result in confirmation from Anonymous, in some shape or form), but it only takes a few members or ex-members to pull something like this off.
http://www.zdnet.com/blog/facebook/facebook-hacked-are-you-seeing-images-of-porn-and-violence/5314