I only met one guy who was very insufferable like 10 years ago. He was a friend of a friend and i had nothing to talk about, so at one point i just asked him what his favorite meal was, because he was aggressively vegan. He told me what he liked and i said: that sounds very good, i have to try that, i try not to eat meat products anymore. And he suddenly had that disgust in his face and said: eating meat is like molesting a child, once you did it, you are a child molester.
Okay, not talking to you again.

But other than that, i think every vegan i know is just like: yeah no i'm vegan. Or: is there a vegan option?