As somebody who is 90% vegan let me tell you it is usually someone else's problem. I NEVER bring it up, but if I decline a free pizza lunch, or cupcake or something then I get interrogated about it. I never comment on what other people eat as it is none of my business but a lot of meat-eaters feel like they can judge my dietary choices. I can't even get mad at Anne for going on about how hardcore vegan she's become, it's no worse than people who are "OMG BACON!!" everything.