If it's natural, legalize it and handle it like alcohol. If it's manmade, like meth, then decrimalize it and leave it alone. Then enforce DUI laws. I don't have an issue with people using these substances but do it responsibly and in private. If you use and drive you put others at risk...just like with alcohol.

It is not the governments responsibility to educate us. If we want to do stupid things then so be it...so long as we don't endanger anyone else or infringe on their rights.