Probably because there will first be people who think that the person just doesn't try to fix it, so they make fun of the person or are rude to them. there comes a point where there are so many people who do it that others will start doing it too just to fit in. So: Peer pressure.
Well let me put it to you this way: If a 5'2'' chick that weighs 400lbs with green buck teeth with a few or 'em missing, and a goiter on the side of her neck the size of a medicine ball becomes America's Next Top Model, I don't think I'll be feeling a lot of love for her. Dig what I'm saying? Otherwise I think we can get along just fine. (As long as she bathes regularly and I'm not sitting next to her in coach.)
I don't think you should separate people by their appearances:/ we all have different opinions, on EVERYTHING. Like you say ugly and fat people are not treated an different than (what you might say) pretty or skinny people. PEOPLE ARE PEOPLE. MOST PEOPLE, look upon their behaviors and personalities, that other people don't like, not their appearance. don't feel bad for (what most people call people) fat or ugly people. Their no different! THEIR PEOPLE! WERE ALL UNIQUE!
People should be judged on the bases of their behavior and attitudes not their physical appearances, the reason being there are so call handsome men & beautiful women that have really ugly attitudes and mean ways which makes them ugly and there are so call unattractive people that we call fat & ugly that a have such lovely personalities as well as loving ways that make then so,so beautiful and wonderful.
Nobody should be judged on their appearances, only on the way he/she acts. it's rude to say "Hey, she's fat, she's definatley lazy." Or "Hey, she's anorexicly thin, she's DEFINATLEY starving herself. Maybe that anorexicly thin girl has a rare eating condition. Or maybe that "fat" person is trying to work out. People have NO RIGHT to put down those people. So if someone has a negitive opinion about you, ignore it because that person being insulted is probably 10x the person who is making fun of them.
Because people are extrememly insecure with themselves and think that by pointing out flaws in others they will make themselves feel better... when in reality it does nothing for them but make them a bad person.
Their momma and daddy didn't teach them manners. However it is society and it's a shame. At a time in my life I had to have the "barbie dolls". I am mainly after now who they are not what they are. Just took a while to catch up on what momma tried teaching.