In America, people without locksmith licenses can't legally buy bumpkeys, sadly. If I had a problem that a locksmith could solve with a bumpkey, I'd be quite annoyed that my payment to him is essentially a government subsidy coming out of my pocket.
I have heard that postal regulations prohibit mailing lockpicking tools though. I have not specifically asked a postmaster or checked on this.
I've been told by locksmiths that lockpicking tools are illegal in my state, yet no one can point out where state law says this. Thats because its not illegal here. Locksmith isn't even a licensed profession here.
That said, it is not that hard to design a lock that cannot be opened with a bumpkey, and there are now some locks that are so designed.
This was in San Francisco, which apparently (alluded to below in comments) on the issue of..pseudo licensed / "driller" locksmith's.
I hate the fact that many times in large companies, or many other professions, that doing "well" "drags down" the mediocre employee's.
This anecdote has got me wondering that perhaps the drillers have more satisfied customers than real locksmiths. The driller makes a big noisy mess, gets covered in brass chips and fits a shiny new lock for only a bit more money than a professional charges to put a key in the lock and tap it with a little hammer for ten seconds.
The human mind is weird.