Should be based on just a few things, as convicted felons "legally" cannot vote either. Criteria "could" be set IF some guidelines apply.
1. NON VIOLENT OFFENSE
2. TIME SERVED
3. WHAT HAS SAID PERSON DONE SINCE #2?
4. EXTENSIVE CHARACTER REFERENCES AND JOB HISTORY
If I stole a car, and took it for a joyride because I was a stupid 19 year old, was convicted of "Grand Theft Auto", served my time, got out, GREW UP, have had NO other infractions of the law, now that I'm forty, I should be denied possession of a firearm?
I can see issuance of a CCW, but a blanket prohibition should be looked at case by case...
IMHO.