[atari 2600]

So, what are we left with?

In my mind, we're left with legitimate hunters and homeowners, for professionals like security guards or bounty hunters, and in some cases, guns for personal self-defense for taxpaying head of households. and I agree that their should be mandatory training. The gun licenses should be a relatively uniform procedure in every state and require training and periodic license renewal. The database should be concurrent with NCIC and all mental health data available from various other sources. I'd give the plan about five years of statistical analysis.

If the above didn't solve much of the problem, I advocate that the Federal Government establish a month-long waiting period in which the potential gun owner surrenders their Fourth Amendment search and seizure rights over to allow the police to search their residence and private property at random at any time during the waiting period.
The intention would be to provide the most accurate possible psychologicial profile of the potential gun owner via on-site inspection of their residence and property.