Let me clarify to you and @thecommoner in case my short answer gave the wrong idea: I'm all for legalization. I dont think anyone has the right to forcibly stop someone from ingesting whatever they want....

There are some caveats of when people can ingest drugs (and to what degree): For instance, I think you would probably agree that it shouldn't be legal to drive blackout drunk? But we are not objecting to the act of ingesting the drug, rather its their inability to reasonably operate a dangerous device in public. It really has nothing to do with the drug....it should probably also be illegal to drive if physically blind or while sleeping, etc.

However the topic of legalization normally carries with it a sort of worst-case implication: Should it be legal for people to become addicted to drugs. For that I also think it should be legal, but well my point was simply: I think it should be legal but wouldn't define that as good strictly speaking. (Much in the same way I think it should be legal to chop your own hands off with an axe, but I wouldn't define that as good).