I find it funnier that people think they can stop bullying, honestly that's impossible may as well get rid of all the humans on the planet. But saying that, it doesn't mean you shouldn't try to help people out. If you do, it'll encourage more people to, maybe get the bully number down. Kind of like waht Kenzi said.
Internet bullies, trolls and the like are probably bashed just as bad as they bash others in real life or have life problems, they use the internet, where they can hide their mannerisms, habits, or anything they're teased for, to relieve that anger on others and make themselves feel superior for once. Trolls are usually just frustraited children who want to, again, make themselves feel like they're the top dogs. That or show off.
I see "popular" artists bash on "younger" or "newer" artists all too much. Then get their flamers to flame them if they do anything about it. It's sickening.