Yeah, I think the 'less is more' concept that a lot of people got into fixing for may also cause them to make other changes in their life, one of which might be vegetarianism... I'm a vegetarian, but that happened long before I heard about fixed gear. I don't really mind what people eat, but I've got a list of reasons a mile long why meat isn't the best thing for me to eat, so I don't bother.
Friend's 21yo brother: You don't eat meat? Not man enough for it? Real men need MEAT!
Me: No, real men have jobs and support themselves instead of living with their mother and begging to borrow their dad's car to buy beer with their allowance. When you take some responsibility for your own life, come over and we can talk about what makes a real man. Until then, you can shut the hell up.
Friend's 21yo brother: *awkward silence*
-sam