Is there any point?
Yes, but... the same applies if you have a nick or name as well.
Anonymity and that indefinite quality we call maturity seem unrelated to me.
If I have a nick/trip/whatever, I tend to defend my "internet identity", I am less likeley to admit that I was wrong, even if it's absoluteley clear. When I post on anon boards, I'm much more relaxed about what I post, and more open to other opinions.
This is where you have to turn to Zen for a few of your answers.
If you get the last word in an argument out of spitefulness and people with marginally less stubbornness and more common sense go off thinking you're an idiot, are you an idiot?
I disagree. Idiots are idiots, and people hate to lose. Once again, I point to world4ch's /newpol/. If you have some sensitivity to English, you'll notice individuals dragging the same threads on for hundreds of posts. Maybe you really are more relaxed about what you post (all the more power to you), but based on what I'm seeing you seem to be the minority. :(
Oh, and stupid signatures. I hate those too. And avatars.
What's an intelligent signature? Does it have to pass a Turing Test?
I'm not >>42, but in my opinion, every signature is stupid, they just take up a lot of space and make reading forums harder. (Extreme example: http://en.wikipedia.org/wiki/B1FF#An_example_B1ffism , and this doesn't even use animated gif's).
Not a troll, I just find it annoying when people throw out opinions without substantiating their reasons. Like, I dislike strawberries, but I'll explain the reason that I dislike them is because I think having quaint dislikes is a good substitute for actual personality.
Alright, I'll elaborate a bit.
a) I don't like avatars or signatures because they're distracting, usually asinine, and make reading a board harder. What exactly do they add? Furthermore, being on dialup, it makes those kinds of boards take a couple of minutes to load, as opposed to ~10s for a board like this one. That's at least ten times longer.
dicks out for Harambe