It took me awhile, but I have learned that in this environment as much as in real life, I can control how I will respond to people and will not allow them to make that choice for me. If I was to give any newbie to message boarding any advice at all, it would be that.

Well said. No one can hurt your feelings or make you angry unless you've first given them permission to do so.
We give that power to those whom we love. But anonymous internet message board posters? Why would you give that power to people you don't even know and are never likely to meet?
Never understood that.
Oddly enough, when I point out that other posters don't have the power to dictate my emotions, they insist they do and say I'm "daving".
Yeah, the insults and psychoanalysis and negative commentary is pretty persistent if some don't like your point of view. I wish the negatives thrown at me were as kind as 'daving', but I just figure those who seem wired to be unkind or hateful have more problems than any of us will ever be able to deal with on line. Such people are far more likely to incur my pity, but they can't hurt my feelings.
I can't say I've never had my feelings hurt on line though. Some people you do get to know on line--a few of these I've subsequently met in person and I already knew them due to our online communication whether that be message boards, Facebook, in a multiplayer game, or whatever. And some of these you let your guard down and a genuine friendship develops. And it is hurtful when they betray you or get mad at you or unfriend you or whatever, most especially when there is nothing you can do about it. But as you said, you have given them permission to hurt you so oh well.
At the end of the day, if you don't have more fun or get more pleasure out of doing this than anything else, it simply isn't worth doing.