Making microwaves not go beep

There are a lot of things to worry about in today's troubled world, but Engadget bestest buddy Paul Boutin wants to know the answer to one simple question: why in the hell can't you switch off the beep on a microwave so you won't have to worry about waking people up when you're trying to enjoy some late night nachos or whatever it is you shouldn't be scarfing down at 3am. Someone out there has to know, right?