The basic problem is that a list of guns is the holy grail of the gun banners. Is it any wonder that the pro gun crowd is afraid of it?

And the reality is that legally purchased guns account for a tiny fraction of gun crime. Stopping every gun purchase by even a would-be criminal is going to do very little except to the suicide rate.

And the "unremarkable" measures often have nasty hidden details. Mandatory safes? Just exactly what do you count as a safe? Doesn't take much of a requirement on a safe before it becomes something that can only rest upon a proper foundation--thus completely prohibiting many apartment and condo dwellers. Put a bolt-down requirement on it and you have disallowed all renters.

Training is looking at it backwards. We have a perfect model of how it should be handled: just look at driving. You pass a test of knowledge and a test of proficiency.