I've really sort of extricated myself from most posting opportunities. I rarely post unless I feel I have something insightful to say or moderately funny, which, you know... *looks at post count to total time ratio*.
I will NEVER post to defend myself or my ideals and opinions, because I've come to the conclusion that exceedingly few people really WANT me to do so. Forums are for talking, it seems, and not listening. There have been countless occasions where I've seen a post or "opinion" that I've desperately wanted to fight against, but have stopped myself on the basis that it will solve nothing.
I just take a deep breath, shake my head, and tell myself it's not worth it.