Check out the 1936 movie "Reefer Madness", a propoganda film funded by Randolph Hearst when he found out that hemp would begin being used to produce paper (he owned lots and lots of forests). The movie was remade recently and was a musical on Broadway, but you have to see the original to get the full effect. Teenager who smokes marijuana comes home from school and murders his entire family.....now, I don't know about anyone else, but most folks I know who have smoked pot don't even want to get off the couch to get more Oreos, much less get off the couch to murder someone.....but the movie is very telling.......