You really can't fix stupid.
I was in a LGS a few years ago and found a Service Six I had to have, anyway, a guy was in there for a while looking at the display, he was open carrying a SA Ruger on his hip. I was filling out paperwork when he decided on a purchase, now his wife had been standing meekly next to him steps up to make the purchase, the owner looks at her and asks if the gun is for her, she looks at her husband, he says its for him. Now the owner is a little hot now, he says the guy has to buy it," can't" he says... "are you a felon?" asks the owner, this guy smiles and says "yes"!!! and continues " but its just for DUI's" I think my jaw dropped as far as the owners!! When the owner told him he could get 8 years for carrying a gun the stupid grin on his face never wavered.
An open carrying felon!!! Somehow he rationalized that since his felonies were "just for DUI's" that he should be able to buy a gun.
Now, how that dumbase rationalized open carry is beyond me.