The Netherlands has had a liberal approach to cannabis consumption for 30 or 40 years and whilst they still take a hard line against Heroin and Cocaine, it seems as though there is less drug fuelled crime in Amsterdam than there would be in equivalent sized UK cities (Manchester, Birmingham or Liverpool). I've been to Amsterdam 20 + times in the last 10 years and rarely see any Police on the streets. Most of the trouble there is caused by drunks not pot heads.
