I ride a fixed gear on occasion, and I'm not a hipster.

As annoying as I find it to make bike riding into some sort of "clique-ish" activity, they are riding bikes, which is cool. I get pissed when ANYONE makes an a** of themselves by disregarding traffic laws/being a general nincompoop, but I think that it makes us more annoyed that people of a certain "clique" tend to do so on a more regular basis... or at least it seems that way because they stick out a little more than us "normal" cyclists.