I've run my own business for twenty years and I've learned that problamatic customers are the nature of the game. All businesses have them. We've got to handle it with grace or go the way of the pasenger pigeon. I know how tempting it is to tell them how we feel, but to do so, serves no purpose. They are guaranteed not to come back if we do. It might make us feel good to display an "attitude", but it won't make us money. We're not in business to feel good. We're in business to make money.

Remember, the customer is always right - at least in their minds. A happy customer will tell a few people how nice your shop is. An unhappy one will go out of their way to tell 20 or 30 how terrible it is. It pays big dividends to be sure you have as few unhappy customers as possible.