I'm for the legalization of pot, or at the very least, its decriminalization (e.g., reduces and reclassifies the penalties). I see the drug war as a waste of money and a losing effort, which requires some radical rethinking about how we approach this issue. Pot is 'relatively' harmless compared to other drugs and is consumed by large quantities of Americans, although most I would guess, consume it over the short term (e.g., college) and don't turn it into a long-term habit. Pot is mostly a phase in life and not a lifestyle, at least that's how it seems to me.
At the same time, turning pot possession into a crime is dumb. For example, my nephew, who was Freshman in college, was arrested for pot possession in Arizona, where it is a felony. The felony arrest remains on his record, and has on at least two occasions kept him from getting a job after his potential employers did a back ground check and found it on his record. Note he wasn't convicted, just arrested, and that was enough. A high percentage of high school kids and college students experiment with pot, most go on to live productive, reasonably law abiding lives. (Hell, when I was in HS in the 70s it was a rare kid who didn't smoke pot.) This obsession with 'zero tolerance' for something are relatively harmless as pot (and probably significantly less harmless than alcohol) is, in my opinion, ill conceived. As a society, we should stop wasting our time and money on a losing battle to stamp out drugs and find another way deal with it, especially when it comes to marijuana.