Any felon can lie and it's very easy to check the box on a newly renewed or existing DL .You points are well taken, but trading guns gives one the opportunity to try out different guns with out paying rent to a range, etc. That said my standard for how and who has gotten stricter over the years to the point of getting a little gun shy, LOL!
It should be noted that felons can't have thing like professional licienses or voter registration cards, which adds to my comfort level
As for the criminal left, I expect a natural death of old age before I let that happen