"Please don't make me angry. You wouldn't like me when I'm angry".
There's a time and place for everything. Mess with my friends or family, I'll react accordingly. Try to harm the helpless, vulnerable or destitute, likewise. I can't think of a single reason why something said on an anonymous bbs would be a reason to get your hackles raised, no matter how pedantic, uneducated or inflammatory the comment.
That said, last year, I had my first revelation that I actually "know" a bunch of you pretty well and that a large group of people that I have never met (save one) has migrated over to the "friend" category. I guess that's what happens when you spend a lot of time with people, even in a virtual sense.