I was going to make a joke about 'crashing' but it's actually a serious issue. What happens when people can freely build complex objects like cars where a 'bug' or unofficial 'patch' could potentially cause a risk to public safety? Is anyone culpable? How would the regulations work? Could they be enforceable?
Some people already build their cars (and car parts), 3D printing just makes it more accessible. What happens is that you have to license the car in order to be able to (legally) drive with it.
I suspect the licensing costs will prevent self made cars from becoming common.
