I kinda want to work backward on this, been thinking about it a long time.
1) When you graduate high school, provided your not a felon at that time, you are given an ID card that shows all of your rights, constitutionally, 1st, 2nd 4th, 10th, and all the other bill of rights. As you go through life and prosper or f''ck up, your card loses rights, or does not change. You must present this card, to vote, purchase a gun, etc... And if your dumb, maybe as you lose these rights, you get the big picture, as they get crossed off your card, and decide, " I don't want to lose any more ".
2) If you are a Felon, you get a flourescent tattoo, that those that need to know can shine a black light on, and it will show up, not visible to the naked eye, but visible under the black light, therefore you have lost rights, and cannot use just an ID to get through, an individual can use this technology, and cheap. Not just a dealer at a gunshow.
3) Of course I would prefer, that felons had tattoo's on their foreheads, and we all know who they are, but I also believe in a 2nd chance and regaining your rights, if you pay your debt. That is why I like the Flourescent tattoo.