Look, I wouldn't have started this thread if it weren't true. I've been to several GenCons now, and there have always been gross violators. Furthermore, I'm the type of guy who will call them out, too. If you're going to force your rank, fetid pallor upon me, I'm going to call you the filthy savage you truly are! Some favourite lines:
"Dude, find yourself a stick of right guard, fast!"
"What was your name again? I was distracted by your overwhelming B.O."
"Whoa, someone at this table smells soooo bad. I think it's time for you to run a shower based solo-quest, now!"