I don't know how true it is, but I could swear to you that I once read one of our many U.S. presidents (I cannot recall which) discovered that nobody paid any attention to the formal greetings customarily issued at the start of large meetings and events. So each time someone approached him, he'd extend his hand for a handshake and tell the individual before him the most absurd thing he could thing of, which was to say he had killed his grandmother the night prior. Nobody noticed and the day continued on in this way until finally, shaking the president's hand in turn, one man replied in jest, "well, she must have had it coming!"
You, the person reading this: you're that guy. Send us an email saying "she had it coming" for five dollars off your next purchase ;)