I worked retail years ago and I learned to kill them with kindness since the customer is always right rule is usually true and it will always get you in trouble, even when you are right and you are trying to save your company money.

So my gift back to retail workers is to stick up for them since they can't do it without getting in trouble. If someone is being an ass to a retail worker whether at a restaurant or department store, I will tell the rude customer what an assclown they are being and I am very sharp witted so I can do it so that they not only know their behavior is unacceptable but embarrass them as well.