The dangerous drug marijuana became a dangerous drug after prohibition was ended. Something had to be vilified. Watch the movie "Reefer Madness" sometime. It's hilarious yet scary at the same time. Pot "addicts" are not prone to violence and you don't hear of them robbing gas station etc. Various drugs are legal and/or accepted in many countries. Crime isn't anywhere near as rampant as it is here in the good old US of A. Go figure.