I don't expect perfection. But, I would accept "pretty well", or even "somewhat". You tell me how this "reasonable restriction" for alcohol is working:
Alcohol Use Among Students in the Past Month
8th Grade: 21%
10th grade: 39%
12th Grade: 50%
Marijuana use is about half that for each group, and teens say it's easier to get than alcohol.
Obviously there's something else at work here, and that something else is the legitimacy brought on by legalization. IMO.