I'd say I'd love to punch some people, but the sad truth is that whoever did those things likely had no idea what harm they were causing and did it for the attention
I have, albeit on /g/ which is actually quasi-regulated. I'm still not convinced that people understand what they're doing. It doesn't make it right, but I don't think a lot of people grasp that what they're doing has a real impact on a real person with a real life on the other side of the screen. They think it's just a sick role-playing game, and they play the role, and they forget that it isn't just a game.