The attitude was rotten, I see no excuse for it. But clothes are a matter of taste. It may not be your taste, but why do you let it bother you. I don't understand why we care so much about what other people wear, don't wear, how they wear their hair, etc. Wear what you like and what you feel comfortable in. Others should do the same. We should all learn to be less interested in silly things like this.
I am an adult, I can choose to wear whatever I like. I enjoy low rise jeans and think they look pretty cool. But, I'm an adult, not a child, so I suppose that makes it my business.