The question is, do these type of comments on Twitter cause harm? If you've read anything by people being subjected to online bullying and harassment then you know that it does cause psychological harm by itself. Especially when a number of people all start in on one person, but even one person can cause a lot of fear and harm from cyber stalking someone. Does someone doing this deserve to have their life ruined, probably not, but they should not be free from all repercussions.