Oh, the yarn snobs can be wanky too, but for sheer volume of wanky text you can't beat the anti-snobs. I've seen people accused of wanting to BAN acrylics/Red Heart, of making the leap "you said the yarn I use is x and y, therefore you just said MY PROJECTS ARE X AND Y!" (where x and y equal negative adjectives). The latter I've seen in threads about all sorts of fiber, whether it's $1.99/skein or $100.00/skein.

Basically, anywhere you get people pinning their identity on the type of yarn they use, you get outraged wankery. Who knew?