AlterNET posted a good article on "The Hemp Conspiracy Theory", which many of you have heard. The Government is keeping pot down, maaaan. Well, here's the facts:

California's 1913 narcotics law banned possession of cannabis preparations -- which California NORML head Dale Gieringer believes was a legal error, that the provision was intended to parallel those affecting opium, morphine and cocaine. The law was amended in 1915 to ban the sale of cannabis without a prescription. "Thus hemp pharmaceuticals remained technically legal to sell, but not possess, on prescription!" Gieringer wrote in The Origins of Cannabis Prohibition in California. "There are no grounds to believe that this prohibition was ever enforced, as hemp drugs continued to be prescribed in California for years to come." In 1928, the state began requiring hemp farmers to notify law enforcement about their crops.

That's just a snip, make sure to read the whole article at the link above.