It's sad, isn't it? And so unnecessary. If only site owners would put some effort into it, the comment sections could be really good places to read. Years ago when I ran a fan forum, I ruled with an iron hand. The rules were posted right at the top, and anyone who broke them was summarily kicked out, with no recourse. I often got thanked for how thoroughly I policed the place, because everyone who hung out there knew there would be no nastiness or fighting of any kind. I simply didn't stand for it. If we got someone ugly hanging around, I'd put the comments on moderation and just deleted everything from the troll until they got bored and wandered off. Worked like a charm. If things had been run that way on the web from the beginning, it wouldn't have turned into the nearly universally nasty morass it's become.