Depends on the political point of view.
Do you think there's any chance at all that a group called Al Qaeda in America could FedEx a box that looked like a letter-bomb? Let's say it doesn't look like a bomb, but a FedEx guy notices the return address before accepting the package. That ain't getting shipped.
Remember what happened when one idiot decided to have an open carry demonstration in front of a polling place and said he was a Black panther?
Wilson's problem here is that a political-point-of-view that's relatively mainstream in America (very few people will agree that hobbyists should not have the right to make their own weapons) is one of the bannable ones in much of the world. The Mexicans are not gonna say "gee, this 3D printer technology is so amazing, it will allow every Mexican (including the cartels) to own the weapon of his choice with a mere few hours tinkering, let's subsidize the shit out of it so everyone can have guns." They are going to ban the import of everything related to the printer platform that Defense Distributed uses.
Most of Latin America has experienced at least one coup d'tat against an elected government that happened because the right-leaning conservatives have greater access to firearms due to their control of the military. In a country with a per capita income under $10k, where almost nobody has a full-sized computer much less a paper printer, a technology which turns a $15k printer into a gun factory is not gonna be seen as democratizing. It's gonna be seen as a really good way for Machiavellian rich guys to stage coups.
And much of the rest of the world is slightly less paranoid about weapons, but still extremely uncomfortable with private ownership of them, which means that if you sell Defense Distributed shit, and they put on their website "this company is great, you can use them to make REALLY COOL DEADLY GUNS!!!" whoever is unlucky enough to be this company will probably be banned from doing business in something on the order of half the world.