That's a good point. Since I am not an expert on the topic, I will abstain from commenting on how mind-altering marijuana is. However, it does seem natural to conjecture that if one smokes more pot, then one's mind will be "more altered", right? Hence, why not follow the Dutch model? This would mean:
- all shops selling marijuana would require the customers to provide some identification card / document.
- a network would connect all the marijuana shops to a central database where each person's purchase would be logged. Each person would be allowed to consume a certain quantity of marijuana per day. If one exceeded this limit, the shop would NOT be allowed to sell marijuana.
That way, one could legalize the consumption of marijuana, but impose upper bounds on how much can be consumed daily.
Of course, the shops could sell pot and not register the transaction at the database, but if caught they would be closed down. There could be a limited number of licences to sell pot per county, so that no shop would have an incentive to break the rules, as that would lead to loss of the precious licence. The downside is privacy. All marijuana sales would be logged at the database.
Would this make any sense? What do you guys think?