^Oh man! That reminds me! I was once buying a silk slip and the cashier was so ...touchy feely with it I told him nevermind and left. I didn't want to wear that thing after the nasty way he was feeling it up!
I occasionally get leering cashiers...I've definitely been leered at to the point that I became uncomfortable enough to leave the shop, but what I really hate is the guys who use the exchanging of money as a chance to do this nasty thing where they slowly slide their hand across mine. Combined with an overly sexual stare it makes for a really unpleasant encounter.
I don't really mind talkative cashiers or the ones who read my name off my credit card -- I assume their bosses make them do that.