And this is another important pro-legalization point. Ask a schoolkid whether he'd find it easier to get marijuana or alcohol, and most of them will answer marijuana. Why? Because alcohol is sold by licensed dealers who have a strong financial interest in keeping their licenses, and therefore a strong interest in not selling to minors. If an alcohol dealer sells to a minor, he risks his livelihood, and that's not a risk most of them are willing to take just to make a sale.
Drug dealers, on the other hand, operate outside the law. They're already risking their freedom by simply being in their business, and it's not much of an increase in marginal risk for them to sell to minors. Alcohol dealers check ID, drug dealers don't.
I'm lucky, I do neither, but I just don't get the hypocrisy.