I would say it's easier to act like a jerk. Acting like a jerk is all about knee-jerk reaction, lack of empathy and sense of superiority. It takes effort to think from the perspective of another and not go with your natural reaction to lash out at something you consider idiotic or offensive to your senses.
What about driving? how many people do you see being dicks on the road? honking, cutting you off, not signaling, driving wrechlessly..yet many of them are decent hard working people with family, friends..etc.
its definitely not just Anonymity that has any cause or effect, usually its a mood or something else caused the response, it can be a million different things for each person on any given day in life or the net.
if there was a single reason, we'd all have a cure.
I think another part of it for me is that rude people are much easier to spot than the 30 friendly ones which comprised of 20 that lurked and didn't post anything and 10 who posted normal and it gets passed over.
That picture was going to be one of my obvious answers I listed in the OP.
You're describing what happens. I'm asking why.
The 3 places I see it most prevalent are:
OT forums.
Online gaming.
Comment sections of articles/youtube/etc
Obviously you don't hang out on kid-raising forums, dieting forums, miracle cure forums, how-to-survive-on-welfare forums, and so on. Those rabid breastfeeders can out-jerk your gamers any day.
I think part of the issue is that people tend to think of the internet as "theirs". It's me sitting here typing this reply. I can say what I REALLY think - I am, after all, a superior person, even if I'm sitting here in my underwear. I am the one who discovered this forum, so I have the right to tell all of you lesser persons what the truth really is.
Not much difference between "superior attitude" and "jerk".
Also, frankly, a lot of that "jerk" stuff is entertaining. C'mon guys . . .
The reason I am is mostly hal9000