All the time growing up. Granted, culturally, I live in an area, where dark men like their women thick, and when I was younger I was anorexic so I was called ugly essentially all the time by guys and girls alike.
Guys would be like "i'm never dating you, you're too thin and ugly." (which of course deflated my confidence) Girls would have all sorts of weird reactions to me. There were some who would sneer at me "ha you're never going to get a boyfriend looking like that!" (one even said that i wouldn't get a boyfriend because I lacked boobs to attract a guy-- yes, she really said that. I kicked a little bit of cream'o'tartar into her pancake in foods class and she was wondering why hers "taste so bad"-- granted we were only 13 at the time, but still). Some thought I was lesbian (even though I'm not-- I'm just not a very feminine female), and would tease me based upon that (come to find out, they were lesbian themselves and fighting their own sexuality). Then there were those insecure girls. Those other than the vain guys were the worst. The ones who tried to unsuccessfully rip me a new one because they thought me staring off in to space in deep thought was me staring at their boyfriend. That's what you call some crippling insecurity.
There was one girl, who associated me with my sister and her friends instead of separately (my sister and her friends were acting obnoxious), and her bf got me by myself to ask me for my number on a friendship basis because he knew that his controlling gf wouldn't be accepting of it if he did so in front of her. But no, she found out and she screamed me into a corner with saying "stop!! he's miiine ugly b*tch"and gestured a blocking gesture like a cop, to where I was laughing deliriously and I couldn't take her seriously any longer. Dumbfounded by her actions, I impromptu sang and danced spice girls to make fun of it (keep in mind this was in the later 90's) and her bf (who was hiding away from my sister and her friends) was dying with laughter and trying hard to conceal it but I could still hear him.
And then there was that other girl from orchestra who tried giving me hell during seminar. I was in the worst mood ever, pms'ing, in a hyper focus, and practicing my contest solo and working on memorizing it. So I was looking away from my music while playing. And she had the gall to walk up to me and suspect me of staring at her boyfriend (she wouldn't have know what it was like to memorize a solo for contest, ms. back-of-the-2nds-section so it's not like she knew what I was doing). She accused me of clamoring over him, staring at him, and of course called me an "ugly unattractive b*tch" and punched my music stand over in my instrument case. I zinged back "GOOD, I can work on memorizing my music and pretend stare at your boyfriend further" She did not like this response, but I was in a mood (you do not ever dare break my intense focus for something so incredibly moronic) and she deserved it on top of that. She threw another punch, this time aimed for me. I ducked. She hit a brick wall. Totally jacked her hand up. And only she had herself to blame for it.
Now, later on, I'm healthy. And it's surprising how people (guys in particular) are now coming out of the woodwork going "omg, you're so pretty now! I can't believe, you're so hot now" like, f*ckers. SO FAKE. It was only after I had the love and support of my bf that he intervened with me, and I put in the hard work required to get well. And here I am, 8 years later. Bf of course always knew I was beautiful. Because he dug deeper and found it in me instead of glazing over just a glance of me and assuming the worst.
I don't think a lot of people can perceive (or even "appreciate") anything in their narrow view of beauty unless it slaps them directly in the face either. Never said the vainest of NTs had a thing for awareness of their surroundings either though.