Very interesting topic... My father, engineer/professional captain, is one of the most intelligent human beings I've ever been around... until the mid 80's when they began enforcing drug testing, he was a continuous smoker... I mean A LOT... does marijuana make you stupid? Absolutely not. .. but if you're stupid to begin with, may as well blame it on something I guess...
I've always wanted to "like" pot, if for no other reason than strange sense of nostalgia... for almost 6mnths I smoked it every day, all types, as an experiment to see how it affected me... what I found, was that it made me ABSOLUTELY WORTHLESS lol... I am the type of person that likes to DO.... Pot does not facilitate this for me...
... although alcohol has many, many adverse side affects... I have never turned down an adventure because I was drinking...
I do not trust any non-regulated/mand made chemical... so the rest of the contraband that I have/would use are of the natural variety...
... bottom line for me is, if you don't have the mental fortitude to handle your chit... you don't need to be partaking of it in the first place...
I.E. SELF CON TROL.