#1 I do a lot. It's better than saying it out loud. #2 Never. If it is for something important, I will reprimand anyone that does cut though. If it's a pretty woman wearing provocative clothing, then I let her pass too. I figure something good for me to look at. #3 Rarely. I too would return the charge if I noticed it. I have returned change many times when given too much. Once it was even $10 too much. #4 Rarely. As I get older, the less of this I do. Maybe it's just the bending over to pick it up part. If I do, it would have to be within the 5 seconds and it would have to be some food I really, really like. #5 Sometimes. Why not? That condensation is just going to waste. You might as well use it for something. I don't mind doing it in front of friends and family though. Wash with the glass and use a napkin to dry.