another random user sends this quote from the BBC:
"Facebook is allowing videos showing people being decapitated to be posted and shared on its site once again. The social network had placed a temporary ban on the material in May following complaints that the clips could cause long-term psychological damage. The U.S. firm now believes its users should be free to watch and condemn, but not celebrate, such videos. One suicide prevention charity criticized the move. 'It only takes seconds of exposure to such graphic material to leave a permanent trace — particularly in a young person's mind,' said Dr. Arthur Cassidy, a former psychologist who runs a branch of the Yellow Ribbon Program in Northern Ireland. 'The more graphic and colorful the material is, the more psychologically destructive it becomes.' Decapitation videos are available elsewhere on the net — including on Google's YouTube — but critics have raised concern that Facebook's news feeds and other sharing functions mean it is particularly adept at spreading such material."