I would say it's because of consequence and anonymity, people do it because they won't be fined or arrested and no one knows about it. People will do all sorts

I would say it's because of consequence and anonymity, people do it because they won't be fined or arrested and no one knows about it. People will do all sorts of crazy things if the system allows them to http://en.wikipedia.org/wiki/Stanford_prison_experiment http://en.wikipedia.org/wiki/Stanford_prison_experiment