Further from the article in Strike-The-Root:

So what? In a free society, some individuals will make poor decisions about a whole host of things: what to eat, what to drink, what college to attend, what career to pursue, whom to marry, or whether or not to ingest “illegal” drugs. None of these decisions should be usurped by government. Each and every one of them must be left to the sovereign individual.

This was a really good article! If you want to drink yourself to death and cirrhos your liver, it okay, it's your free will. If you want to go home after a long day and smoke a joint in the privacy of your own home...you're a criminal.