Very rarely, just like the ones that falsify a background check form. There were more than 15,000 fraudulent forms submitted last year with 44 prosecutions. A few gun traffickers are caught but very few of their clients.
So I guess if they save just a few lives it's not worth it then either eh?
Sorry, there is a price to be paid for freedom, just ask the millions of our military dead and wounded. There is evil in the world and no law will change that, but would you dishonor our dead by freely relinquishing the rights they died for simply for imaginary security? I think it was Franklin that said something like anyone willing to give up liberty for security deserves neither liberty or security. The current NICS system data base is so lacking because states can't afford to input their information, increasing the burden on that system would be a waste of resources. The emphasis should be on prosecuting criminals and figuring out a way to make it more cost effective for states to update the system, just adding more requirements on the states and threatening current funds will make the problem worse, not better.