I think it’s stupider than that. They have no idea how a handmade gun could be built without a 3d printer. They probably have zero clue what a 3d printer actually can and cannot do, and I’d bet most politicians have never seen one or bothered to understand it before regulating it. Their sole exposure is a few loud people who also do not understand anything about guns or 3d printers, and confuse that lack of understanding with definitive proof that it is evil and should be banned.

I don’t think that changes it actually. Even if the drunk guy lives on a floor that’s high up, he didn’t fly to get there, so there is some combo of random walking and moving that gets him back there. Like walking into an elevator that happens to be on the ground floor, and also happens to be going up to the right floor at that time. Or walking to the base of a staircase, and (50/50) randomly going up it. It definitely isn’t technically a 2d plane anymore, but there are still a finite number of 2d planes that he could be trying to get to ( the highest floor on the building with the most floors).