Obviously many people can not control their use of alcohol. How many drunk drivers have killed someone.................obviously more than all the terrorist and nut job attacks combined. That's what we need now viz., more intoxicated MJ smokers on the road or with a weapon. It seems to me that medicinal MJ could by used by the medical profession just like any other RX drug. But for recreation the use should be illegal. IMO. Also, IMO, any mind altering "recreational" drug is a step up to a more serious addiction.
Look around and what do you see in your own family, in your own city, on your own streets and highway, or in court for serious crime.
The next State..........Massachusetts