John Marcone said:
As long as you can still fire people on the spot for coming to work stoned and they are not allowed to drive while stoned then I do not care.
Sure it has long term side effects and totally destroys your memory but eh, thats your problem.
Maybe make the legal age for it something like 30. When either you are employed and fully matured (and therefore you have complete responsibility for your actions (i.e. you can't blame immaturity)), or when you haven't got a proper future within your society, and if you are the type to smoke weed then you probably wouldn't have a much brighter future anyway. Kind of a balance between "people can do wha thtye want to their own bodies" and the "protect the children" argument.
EDIT: Though I would like to clarify. I'd prefer that it be legal, but that it retain a heavily negative social stigma. I mean, if you
really want to risk drug addiction, meantal health problems, lung problems, financial problems, etc, then that is your choice (once you are well and truly past the maturation stage of life, so that you are in a position to actually make life-changing decisions). But at the same time, I'd prefer it if society (and all its members) were of the opinion that substances such as marijuana were not preferable.
So kind of "When you are at full physiological maturity, you should have the right to do what you wish to yourself, as long as it doesn't cause harm to others" with a heavy leaning towards a negative societal view of physically/mentally harmul and addictive drugs.
However, given that society has not reached a stage where all but a significant minority can be trusted with access to drugs, then legalising them would probably have a terrible effect on the yougner generations as the older generations improperly enforce the age restriction for substance use, and the younger generations' ideals cause them to try these drugs at a stage where they are not responsible enough to use them responsibly, and not physically mature enough to be able to handle them.
So ideally I'd want 'legal but with a heavy negative social stigma', but realistically I'll go with illegal, simply because people aren't ready for it.