Therefore anyone with a legitimately purchased gun could not use it for crime without automatically implicating themselves. This also gives the owner a large incentive to make sure that their gun does not fall into someone else's hands. Otherwise if you are caught at any point in the future with that gun, you will be implicated in the original crime. It's about 10 times riskier to break in to somebody's house when they have a gun. You could get shot, after all.
Criminals are rational beings, after all.
But they would at least get the basic information they need in order to be safe. Personally, I don't feel threatened by a good majority of the NRA members. When you're on that, you show that you're interested in guns and then must have at least some knowledge. It's the others. You won't take time to aim when you're threatened you might make a mistake.