I've had an unpleasant brush with self-righteously based nonconformity ever since I told my friends (two of which are the types who will 'never get married, no matter what' even though one has lived with his girlfriend for nine years) that I was going to be getting engaged.
It's a more... mm, evolved version of a nonconformist versus conformist argument, but similar, and I find myself being on a rather personal end of invasive and close-minded criticism.
I agree that conformity/non-conformity becomes less of an issue when you need to get a job. Do you conform to social standards? Yes. Yes, you do. I've wanted to dye my hair either blue or bright red for the past year. Why haven't I? Because it's not acceptable for my job. Could I find a job that would let me? Possibly. Jobs aren't as plentiful as they were, though, and I'd rather not narrow the field anymore than I have to.
Survival instincts.