Just my own opinion, but marijuana is potrayed poorly.  Anti-Durg campaigns do not state facts about marijuana.  They tell children and adults alike that marijuana is a dangerous drug that damages the brain, is a gateway drug, and many other myths that have been proven false by numerous tests and studies.  And the problem, is that these people do not realize they are being told lies.  If marijuana is legalized, the government can regulate it, tax it, and make a proffit from it.  When you break it all down, the legalization of marijuana is a political strategy.  If a governor legalizes cannabis the chances of him getting elected are very slim.