They regularly accepted licenses from other states and provinces… the employees didn’t always know to recognise them, but they are officially accepted. The health card thing is a bit of an anomaly, I think. If they didn’t have so many problems with fakes when they first changed formats, they probably would accept them (unless the story I was told repeatedly isn’t true… that’s a possibility!)
I don’t know how the make-your-own wine places work, but they are clearly within the law, since there are quite a few of them. I guess you’d have to ask!
Yes, the BYID is pretty much a “I’m allowed to buy booze” license. For those people who, at 19, don’t have a driver’s license, it is often easier to just get a BYID than to carry a passport around (or join the Armed Forces!)
The Québec government controls the sale and distribution of alcohol in this province too. They have the SAQ, which is a lot like the LCBOs, which sells wine and liquor, but beer and malt-based mixes and some wines can be sold in grocery stores and dépanneurs (convenience stores). Hotels, restaurants, etc get their license and deliveries from the SAQ, I think. The legal drinking age here is 18, also. I like to joke that the difference between Ontario and Québec’s attitude towards alcohol is in the names… Liquor CONTROL Board of Ontario… Société d’Alcool du Québec (Alcohol Society :))