Well that is an idea that may actually deter a goodly amount of people. I don’t know if it will significantly reduce access to guns on the black market or address mass shootings though. These are the areas that need immediate attention.
I will keep it short but add in that it is just part of the solution for mass shootings. And is a building block that can be strengthened by penalizing failures of reporting agencies to report.
Example. The Virginia Tech shooter clearly, clearly, clearly had been hospitalized before the shooting for mental health reasons and for being a danger to himself and/or others. But he passed a background check quicker than shiite because no one reported it into the database. So not only do you have the massive numbers already being rejected but you have massive numbers that would be rejected but passed because reporting into the data base is loosey goosey.
I support closing gun show loopholes too which usually gets me some hate mail from the conservatives. That's fine. If I want a friend I will get a dog.