In all honestly, you have to look at Prohibition, what it caused to happen (Gangsters.. notice no "a" so I'm talkin honkies like Scarface Al Capone) and then what also happened when they ended it..

I say legalize it, grow it in secure areas, tax it and place a tax sticker on it like cigs and set an age on it like 30.. Its a win/win situation.. The Govt makes money bc of the taxes, and also they can fine ppl who bootleg or deal it on the streets, they can still get people for underage just as they do with alchy, and the people also get what they want out of it. Turn the DEA more into like an IRS as far as a regulator.