If we do go ahead and legalise MJ here in Canada, though, I'd like it to be restricted in a way similar to booze:
1. Limit the sale and consumption to people of 18 years of age or older. I don't want my kid smoking (and once he's an adult, he'll be able to choose for himself).
2. Limit the consumption of marijuana to private residences or licensed facilities. I don't smoke MJ myself, and I don't want my visits to the park (or downtown, or other public places) to be subject to clouds of pot smoke, any more than I want to be exposed to cigarette smoke.
3. Ban driving or use of heavy machinery whilst under the influence, as with booze.