My bad, it seemed as if you were doing the "well, they're all just too young to understand my superior positions" routine. I misunderstood you
The most obnoxious forum I frequent (politicsforum.org) is filled with a gaggle of psuedo-intellectuals who revel in labeling themselves (fascist? technocommunist? paleoconservative? It's all there!). Most of them are a good number of years older than me. That's been my most negative experience.
Of course, this forum has plenty of the kidz going through their political maturation phases. It annoys me to no end sometimes to see the slavish obedience to a bunch of talking points, but I take comfort in the fact that at least they care. I think apathy is a greater evil than being communist or a free marketeer, but maybe that's just me