I've seen it too often, in too many forums and venues, for it to be coincidence. I've seen it in people arguing about politics, copyright, game design, literature, science, and religion. It's an observation that I think would hold true whether we were discussing classical Greek etymology or the latest Pokemon game for the Nintendo DS.
Sigh. Sometimes, I think everyone in the world just deserves a good kicking, you know? And, well, if you don't agree with me on that... you're wrong.