I can just picture the incident in slow-motion...
"NOOOOOOOOOOOOOOOOOOOO!!!!!"
I'm sorry that girl sat on your letters. Even if she had no idea that this was a sign of disrespect, she should've had manners enough to know you don't put your behind on someone's personal property in general!!
I would hate when people would come up to me and try to tug at my jacket and say "lemme see." Ugghh! Or even worse, "can I try that on?"
As an active, for some reason it seemed like the guys were more interested in our letters. They would always joke and say that they were going to put them on and run around campus with them if they got the chance. Now how silly would that be?!