true, but if a large tax was placed on the drugs to cover future problems as you suggested, they would still be expensive[thats in general] specifically cannibis isnt really imported cause it can mostly just be grown here, and by crime i dont really mean possesion, growing ,dealing, buying or anything like that
i mean stealing, violence, prostitution all things involved with getting enough money for drugs, which i beleive would go up as incidents of drug use go up
alcohol related violence and robberies is a bit of bullshit, it was 90% crime related to importing or brewing alcohol, ofcourse that problem went away when alcohol was made legal again because there was no need for secrecy. The violent crimes were due to crime syndicate control of the alcohol business, which again became unnesesary when prohibition was lifted.