lol My friends in other sororities here were told to only appear in sorority gear and letters if they were wearing full makeup and had their hair done. If not, don't reach for letters.
I definetely don't think college students are gross. Sure I've seen a couple of guys on the bus who haven't yet learned what a dryer is for (and reek of moldy clothes), but I think college student look great. Hell people even dress up to go to the gym (pearl earrings and makeup) and I don't think it's just my college.
On the topic of sorority girls, I have several guy friends who can tell from 10 ft away which girls are in sororities and which aren't (when they're not wearing letters). They even make bets on it and can usually even tell which sorority the girl belongs to. Sure it's a little stereotypical, but you wouldn't believe how often they're correct