There is an extensive body of medical evidence that, for a significantly large slice of the population, marijuana use triggers schizophrenia and other mental disorders. This imposes substantial risks and burdens on the general public.
Yes, filed between the studies: "black people" are inherently stupid and criminal" and "The autopsy reports from Roswell NM.
Yes, chronic use of Marijuana, just like alcohol or Captn' Crunch or McDonalds is not good for you.