I support these claims. Every marijuana-smoker I know is a paranoid conspiracy theorist who's theories make less and less sense whenever I talk to him. Yes, I only know 3 heavy marijuana-smokers.
Maybe so, but then I've never smoked anything.
Does that disprove the argument?
But seriously, a toker I used to know freely admitted the more he smoked the more paranoid he became.
From what I've seen it also seems to make people progressively more bitter about their lives, and a stronger feeling its all someone elses fault.
Not sure if there is a medical name for that. Liberalism?