>The whole issue is that the widespread availability of the devices would make such laws unenforceable in practice. Gun and explosive laws are already unenforc

>The whole issue is that the widespread availability of the devices would make such laws unenforceable in practice. Gun and explosive laws are already unenforceable. Explosives are easy to make - you can get recipes off the internet. And guns are easy to make, too, as I pointed out above. It's not clear to me that 3D printers will be any cheaper or more ubiquitous than milling machines, but in any case milling machines are already ubiquitous. What keeps people from making machine guns and bombs is the severe penalties associated with doing so. That won't change with the advent of cheap 3D printers, even assuming a printer that could make a gun is ever cheap.