Wow! I'm surprised that a large majority of your classmates think we (or rather, "they") SHOULD judge people by the clothes they wear. Pretty judgmental group of classmates I'd say! (You did say that, right? Maybe I read it wrong. I'm getting old...)
I've personally known many a person who although quite wealthy, they actually looked like a homeless person living on skid row... (and sometimes smelled like it too...) Sure they're a bit eccentric, but lovely, kind, and GENEROUS people nonetheless. If I had judged these people to begin with they wouldn't be the good friends they are of mine today.
As an overweight woman, I like to refer to myself as a BBW (Big Beautiful Woman)... Aside from the fact that I don't give a crap what people think of me based on what I look like via the clothes I wear, etc. anyway, I have been so tempted to buy a t-shirt and wear it that says, "Does this shirt make my butt look big??" or something like that... I'd love to see (and hear) the reaction and judgement of people... Maybe I'll wear it to my local Wal-Mart or something....
Good luck on your essay!