I spend some time on reddit, which is quite the "melting-pot" amongst internet forums.
Every now and then I'll see a video (like today) of someone being an asshole and then getting knocked over or punched, and it's celebrated. I'll read through the top 50 comments and find no dissent at all.
Then I post something like "Wow, that could have been handled a lot of other ways. What if that person was seriously injured?" or something to that effect. I'll get about 10 downvotes in as many minutes (but of course never a decent rebuttal), and then my comment is below the threshold to be shown to most users.
What really troubles me is that these aren't secret agents of the state, trying to destroy the voices of peace; they're our neighbors reveling in unwarranted aggression.
Just felt like venting. It's nice to have a little corner of the 'net where you aren't shunned for wanting peace!