I can see a parallel with another program. In Arizona, and I imagine other states, if you're going to be employed around children then you need to get a background clearance from the state department of public safety (Highway Patrol). You get fingerprinted, fill out the standard FBI fingerprint card and send it off. A couple months later you get your card. Five years later you have to do it again - renew - prints and all. So you have this card you can carry around to prove to your employer, or any prospective new employers, that you have this clearance that says you're a "good guy." Background checks for firearms "could" work like that. You'd have to show your "good guy" card to buy a firearm. Course the current system hasn't curtailed child abuse since most child abuse doesn't come from professionals, it comes from people the kids know - like their parents or a weird uncle...but damn...we got them cards....
"Get off my lawn."