A guy I used to work with went to exchange a Craftsman 3/8" - 7/16" box wrench after it broke. The salesman asked him how it happened, and he said "it just broke." Salesman gave him a new wrench, but I guess the guy felt guilty and said, "Look, I have to tell you, I did put a 2' cheater pipe on it." The salesman smiled and said, "Good. That's what we like to hear."
This exchange did happen a number of years ago, though. Like 30.