Cannabis is not physically addictive. Few users develop a psychological dependence. There are fewer problem users amongst cannabis users than amongst users of legal drugs. We should target our resources not on specific substances but on specific people. First we should make accurate information available.
Most people avoid bad risks if they are given enough information.
To those who still run into health or other problems we should then offer help, whether they abuse alcohol, methamphetamine, nicotine or even cannabis. Chances are, if all the effects of drug abuse were out in the open, it would encourage people to be more careful and it would make it easier for those who need help to get help. If drug use is increasing then that is for a number of factors, such as changing values, cultural influences, personal experiences in people's lives. Drug use is just a symptom of other causes, some of which are very difficult to address. It should not surprize us that attempts to treat the symptoms have little effect when the root causes are left untreated.