My position is this. The War on Drugs is a failure. What we have found is that incarcerating folks for possession does not resolve the issue. When they are released, their drug use continues. A major part of this problem is that these folks, even if they want to get help for their substance abuse issues, cannot afford to get adequate care. This is, to some extent, a health care issue, whereas the insurance industry often marginalizes both substance abuse and mental health benefits. Let's throw alcohol into this, also, as the majority of major crimes are either surrounding some sort of substance or occur because of a substance or intoxication of a substance. Legalization presents us with solutions to many problems that the War on Drugs fails at. Firstly, incarceration for simple possession is ridiculous. Not all marijuana smokers are addicts or commit crimes... just like not all drinkers of alcohol are alcoholics or commit crimes. Further, if the government legalized marijuana use, they could tax the hell out of it. When you combine the monies from these taxes, plus the huge amount of money saved from eliminating the war on drugs, this money is then to be used for free substance abuse rehab for folks that ARE addicted. By doing so, not only do you eliminate a failed policy, and cease charges for something that tends to not created criminal behavior, but you provide a service for those folks that DO have a problem, assisting them to become more productive members of society and to NOT use their addiction to become involved in criminal behavior.
All consequences ascribed to alcohol would apply... driving under the influence, underage intoxication, etc...
I have not decided whether or not this should apply to "harder" drugs, though the free care for addiction, should.
That's my basic position and reasoning. Instead of criminalizing the problem, treat the problem... when there is a problem.