Prohibition of vices does not work. Ever. Making them illegal does not stop them. Ever. It is precisely the prohibition on marijuana that creates a black market and invites the involvement of unsavoury or unstable characters. If you bought your dope at the local liquor store you would remove the excessive profit, the criminal element, the grow houses, and all of the other things that make it such a lucrative business. Yeah, sucking smoke into your lungs is unhealthy, but throwing teenagers into jail isn't the way to stop it. Tobacco smoking is in decline because there is a general belief in the population that it is not a good thing. That belief allows politicians to bring in regulations even though the tobacco lobby opposes them. When you can get the bulk of the Canadian population to believe that recreational drugs are not socially acceptable - and I include alcohol and maybe even coffee in that one - then restrictions on use and sale might begin to be possible.