[gpm]

That will be an interesting experiment to watch in the years to come.

I have my doubts that it will work, or at least that it would work here (in Canada). When I was in high school I knew too many people who were smoking illegally for me to think that you could just slowly creep the law up the age groups and not end up with a thriving black market. Hopefully I will be proven wrong though!

To describe why I think this is unlikely to work in another way, I think banning it for young people is really only effective because they have almost no money, and the illegal sales to supply them mostly aren't done through criminal gangs using it to fund terrible things, but slightly older people who are just using it to earn a little extra money. Both of those break down once you start banning it for older people, even if it's always been illegal for them.