When you come across a rude salesperson or clerk do you say something to them about their attitude? For some reason the ruder a salesperson is, the nicer I am to them. I used to work on checkouts and sometimes I would be in a bad mood and all it took was one nice customer to snap me out of it. It also makes me wonder if maybe they are having a really bad day and they are taking it out on everyone else. Either way, its their problem and being nice to them makes me feel better.