Yes but then you would have to own something that contains Americium. We put up with it in smoke detectors because house fires are more scary than the radiatio

Yes but then you would have to own something that contains Americium. We put up with it in smoke detectors because house fires are more scary than the radiation, but I don't see why you'd want even the tiny extra risk of the thing getting somehow broken or burnt in an illegal recycling fire or something, just for random numbers. Maybe you could do a safe version that used a banana as the radioactive element, it would make enough entropy to seed a RNG.