Vote yes on Proposition 19, the measure to legalize marijuana, and the unofficial state weed and largest cash crop will be controlled like alcohol, police will focus on serious crimes and California will get billions of dollars in new taxes. That's the pitch proponents make. "It's a jumbled legal nightmare," opponents retort, disputing those claims and insisting that the measure would lead to stoned nurses in hospitals, drugged motorists on the road and more high teenagers.