Interstate commerce my ass!
OK, public confession. I've tried wacky tobacky, and found it more painful than pleasant. I'm a reformed cigarette smoker, and I've been known to ingest the occasional Scotch and water, or on other occasions to enhance the treasuries of various breweries, but for the most part I would rather be sober.
So I'm not looking for a way to get high legally.
The war on drugs was lost before it was declared. My own opinion is that the government should do with drugs what they did with Viet Nam. Declare victory and abandon the project.
I know a few people who enjoy the occasional toke, but I have no idea where they get it. They might grow it themselves, but I don't bother to ask since I have no interest in knowing. I believe there is some medicinal value to marijuana, although it seems to apply to a small minority of cases.
I've read conflicting reports about the dangers of smoking marijuana. The lack of quality control would concern me if I were of the mind to partake, which would then lead me to grow my own. At least I would know which insecticides were used.
After all that, as you might guess, I favor the legalization of marijuana (as well as other recreational drugs, but they're not part of this discussion yet). I would rather my friends buy their herbs from a reputable manufacturer than from some gangster with a monopoly on his turf. Legalizing (and regulating, like alcohol) marijuana would eliminate a large piece of criminal activity that is really little more than a black market, allowing that commerce to be regulated and taxed as other businesses are, and would also eliminate the sending of neighboorhood entrepreneurs to the universities of criminal behavior, commonly called "prisons."