Knives

I have never understood why some people put their knives upside down (sharp-side up) in the dishwasher. I can understand that people might want to prevent the knife from going through the bottom and poking through, but doesn't it seem more dangerous to have them sticking up where anyone could grab them while trying to put them away? Luckily, my dishwasher in Utah has a silverware holder on the door, so any amount of poking can be avoided.