Or, heaven forbid, a kid could spill a pinch of bread yeast into a bottle of fruit juice, wait a week or so, put it in the freezer overnight, and get some alcohol stronger than wine! No internet required!

In practice I think most young people who want to drink will just get it from a "cool older brother" or steal it, whether from parents or corner stores. At least that is what I saw in semi-rural America.

People will do what they want to do, with or without vending machines and online ordering.