a friend of mine (who is vegan) was once on a dating site for vegans and vegetarians and other such folks. she went out on a couple of dates, but then decided to look elsewhere for a boyfriend.
she said she spent every date with these other vegans being questioned about every detail of every product and aspect of her life, and if she answered "wrong" they would say judgmentally "you know that's not vegan, right?"
yeah, enough dating vegans, she said.
she met her BF on another site, and turns out he is vegan, but didn't ask her any questions about her shampoo.