Logic tells me that it's a preaching issue, though I've never actually heard any criticism of vegetarians/vegans except on television shows. I veer towards the vegetarian side myself (see below) and while my friends tease me all the time about bacon being delicious, and I lecture them in return, it's definitely a fond thing rather than an insulting or mocking thing. One of my friends bought me a t-shirt saying 'save the pig'.
So yeah, I don't eat pork or fish. I don't cook chicken or beef for myself, but I'll eat it if I'm at someone else's house or sharing food in a restaurant or something. I don't think it's morally wrong to kill and eat an animal (depending on its intelligence... I won't eat pigs, dolphins, etc..) but the livestock and fishing industries are way too environmentally unfriendly. I'm currently cheering for the... CRICKET INDUSTRY! A tiny amount of space, tiny amount of water, tiny amount of feed, and it's loads of cricket protein for everyone!
http://chapul.com/