No ID? No booze
When I worked at a liquor store, and people would scream at me for asking them for ID and then say (because I look young) “You aren’t old enough to work here…. let me see YOUR ID!” And then I’d say “There is no law stating that I am required to show you MY ID, you are the one trying to buy alcohol, if you want it, the law does state that you have to show the ID.”
Some people would grumble and show it, others would continue on and either beg or yell. So then I’d say “If I sell you this illegally, and a member of the Gaming and Liquor Commission happened to see that, I’d get a $5000 dollar fine personally, and the store would get a $50,000 dollar fine… so if you really want that bottle, your total will be the cost of the bottle plus 55 grand.”
If that didn’t work, calling the cops was next.