Eh, personally I try not to voice my concerns about marijuana legalisation, as I'm all for it (and decriminalisation of other drugs) but fuck the herb itself. I regret my years spent as a stoner, and cringe on how the stoner culture is cool now. Weed demands more respect than people seem to do, especially teenagers.
We all have stories about the friend who's a stoner and built a billion dollar business. Yet somehow the stoner that doesn't seem to do much with his life we attribute to a flaw of character, which I disagree with.
In any case, definitely stop ruining lives and incarcerating them because they choose to partake in it. It's still just a plant, and much less dangerous than other legal "highs".