Please list the massive social costs associated with TheSTickMan's use of cannabis.
Shot 60 Times: Arizona SWAT Team Kills Marine In Botched Marijuana Raid
Long term, there are public health costs, as cannabis has been shown to be impair cognition. Yes, it makes people stupid.
short term, there are costs arising from the fact that some very dangerous criminal elements are involved with the production, distribution, and retailing of cannabis.
You will object that the criminal problems are artificial and will be mitigated or eliminated with decriminalization. That does nothing to solve the fundamental and uncurable objection, that the stuff is bad for you. You will object that we allow alcohol and tobacco, both of which can do harm if abused. The answer is that alcohol use is governed by millennia of custom in every culture, so that the human race has developed standards for use that are socially enforced. Moreover, even the occasional abuse of alcohol usually imparts no lasting damage to health. Worldwide, tobacco use is declining in developed countries as its risk to health comes to be better understood. There is no good reason to sanction the artificial mainstreaming of a recreational drug non-native to every successful culture on earth.