Here in Austin, which I call the land of starving yuppies.. people WILL deliberately call someone OUT if they are eating something they do not think is ok. At whole foods grocery store it is common place to sit in the market and hear people loudly having conversations about how 'stupid people are' for eating ( meat, only veggies, fast food..etc) at a deliberate decibel so that the person the statement is aimed at will hear too.
People walk up to others tables and will stand there and tell them how what they are eating is bad. The elitism here is absolutely disgusting and rampant. I know this is not common elsewhere so my statement and idea may not be too clear to all.. but that is the behavior I speak of..
I've never had that happen to me, but I can certainly see someone doing it. I don't know about the yuppies, seems to me the hipsters are more like that (if what I'm thinking about hipsters are true).
To the OP, it sound to me like your friends are just ******* pretentious.
I love the type of person who has to announce to you immediately after meeting them "I'm a vegetarian". I always want to respond "I'm an Episcopalian"
I was at a temp job back in November. 4 of us were working on a month long project. This one chick, Kate had just moved here about a week ago, from Pittsburgh.
Within literally 2 minutes of we 4 strangers meeting, she made that announcement. My first thought was "Oh honey, you don't know anything about Austin, do you?"
Anyway, by the end of that 1st day, she felt she had to reinforce that not only to us, but to anyone else she talked to. She was about 25, had just got her masters in political science, and was at the stage where she knew more about everything than anyone else, even if they were decades older.
I saw withing the first week that, although she didn't eat meat, she did smoke about a pack a day, apparantly went out most nights and have a few drinks, drank gallons of coffee since she only managed to get about 5-6 hours of sleep a night, and when I did she her eat something, it would be a pop tart, or cake balls someone had made.
I casually asked her at about 2 weeks why she was a vegetarian. She said something about hormones, but didn't have anything else to say when I then asked her if she didn't think the cigs, alcohol, sugar and lack of sleep were doing more damage.
The funniest thing was, she never once noticed during that entire month that she never once saw me eat meat. I do eat meat, just not as a habit.
That's because someone could go for years and never notice their friend never eats dairy, or something else, if they never brought it up.