There are many alcoholics who do not want to drink, but find themselves under a compulsion to do so. And unfortunately, they have easy access to as much alcohol as they can afford. So, what do you think about the idea of a person willingly choosing to have their driver's license stamped with a "Do not sell this person alcohol" code or color. Logistically, bartenders would now have to check everyone's ID, but that's probably a good idea anyway?