Lock up the criminally insane.
No need for such background checks if the insane must be accompanied by a legal guardian at all times.
The pills don’t cure them, they just make them pass for normal until they snap. Or quit taking their meds. Or augment their meds with pot and other drugs.
The trend has been to question people about their gun ownership. It is required in the VA Hospitals.
The VA has even taken a position that if an individual is not capable of managing their finances and another person is appointed to handle their finances, the Veteran must turn over their guns.
Such as the Virginia Tech wacko. The college couldn’t be given a report. His parent couldn’t do anything about his meds because he was an adult. He was untouchable. Free to kill as many people as he wanted and no one could legally stop him. He and his fellow psychos should be branded on their foreheads and locked up for the sake of everyone else. Political correctness allowed him to kill 32 people and injure 17 more.