To wit, I bring you this, extracted from a comment board:
My wife has certainly had enough. She's far more extroverted and conscious of social status than I, and though she's also the product of a Ph.D. program, she long ago stopped admitting it and by all measures is generally embarrassed to admit that she ever had anything to do with teaching, because she feels that it lowers others' opinions of her.
This is just one data point, of course; but it is raw data, straight from the street. And if you want more like it, I'm sure they're not hard to find.