I don't see what the big deal is about vegans choosing other vegans. I'm not a vegan, but I can understand choosing to have sex with people whose values comport with yours. How is this any different from someone who is straight-edge avoiding dating drug users? Or someone who is an atheist not dating religious people? Or vice versa? Does it limit their potential dating pool? Hell, yeah. But I wouldn't be bothered by it, unless I wanted to date one of them. I'm not going to get all worked up over what other people choose not to eat or who other people choose not to have sex with, considering that it doesn't affect me at all.

I think we already knew vegans were self-righteous. Let them breed weak children...