That's only part of the picture. I'm also not in favour of treating the drug problem as a criminal law problem of morality. It's appropriate to treat drunk driving, homicide, assault, sexual assault, or any number of offences as criminal offences deserving of prohibition and deserving of penalty. If I put smoking marijuana, drinking alcohol, and smoking tobacco alongside each other, I'd say the one that's most likely to kill you, the one that's going to be the most damaging, is probably tobacco. You wouldn't want to have official powers to encourage any of those activities, but we're using a sledgehammer, the criminal law, to control a problem that might be best dealt with through other means.
On April 30th, 2009. See this statement in context.