I've met people with all sorts of eating styles who believe it's approprieate to comment on other people's food choices, including a vegetarian dorm-mate who baad, or mooed or clucked whenever she saw anyone eating meat (Yes, I know meat comes from animals, you don't have to make animal noises or tell me I'm a murderer, as I eat).
Most of the really rude stuff (in my experience) tends to come from adolescents and very old people, but no group is exempt. I'm an omnivore, but I eat a lot of exotic and unusual foods. I get teasing and get commentary from meat-eating AND vegetarian friends and even strangers for "eating weird ****." When I worked in corporate cubicle land, I can't tell you how many times I heared, "Ewwwe Gross!" of "What is that?" And I'm not talking about mystery casserole concoctions, but even only mildly exotic fruits like Ugli fruit (I admit the peel is a bit odd looking, but inside it looks like a grapefruit or an orange, how exotic is that?).
I'm not even exempt. I do participate in the teasing of a friend who we call a "baconarian," (we coined the name, because she eats no meat or fish except bacon and surimi. The only meats she will eat are crisp bacon and on very rare occasions imitation crab meat - and her love of bacon borders on the unnatural). Even if it weren't for the animal products, it seems a shame to call anyone as veg-phobic as she is a vegetarian (she's essentially a carb and preservative junkie).
But when you're a baconarian junk-foodie like my friend or a weird-****arian like myself - you learn to laugh at yourself and to tune out any of the unwelcome commentary.
You can speak up if you find it rude, and people who care will change their behavior - but people who don't, won't.


You may find it much more enjoyable to discuss your new lifestyle with other vegans.