sorry if this has already been mentioned on here, but if so here it is again.
text from the petition page:
'The following are actual pages on Facebook: "Raping your mates girlfriend to see if she can put up a fight", ?Kicking Sluts in the Vagina,? ?I know a silly little bitch that needs a good slap,? and ?Riding your Girlfriend softly, Cause you dont want to wake her up.? These clearly are in violation of Facebook's own policies and need to be removed.
Facebook?s own Terms of Service prohibit content that is ?hateful, threatening,? or contains ?graphic or gratuitous violence? Moreover, users are specifically barred from posting content that aims to ?bully, intimidate, or harass? any user.
Facebook could and should do more to stop them from popping up in the first place and to swiftly remove those that do exist'
the thing is, it's not just the pages themselves, they get filled with comments that are even worse than the names of the pages - you can imagine.... 
Please sign if you haven't already.