I agree, meth and cocaine both lead to psychosis with prolonged use.
This isn't the thread for it, and I know I am lagging, but to expand on my previous post....
Cocaine is so addictive, like heroin and many prescription drugs, that I think it should be severely limited, if not banned. Doctor only. LSD, I have no problem with, but any substance that allows a person to incapacitate a whole city with less than a gallon needs to be controlled, although the current penalties for possession are insane.
'Nuff said. Small-l probably doesn't like where I go with this, so don't tell her ;)
I just don't think marijuana is sufficiently dangerous to be regulated more severely than alcohol.