Just saw a video about some kid who posted a "joke about immigration" on the Facebag and resulting in some Twitterbutt to dox him to "ruin his life", suspended from college and sounds like even false criminal charges. Two thoughts:
1) People really need to stop using the Facebag.
2) I think it is only a matter of time before someone who starts a Twittermob gets killed by their victim. If you "ruin" someone's life, there's a non-zero chance they will try to hurt you.