I’ve known one that definitely did as he had to be hospitalized. Extreme stupidity and/or psychosis is not an appealing trait to me. Definitely no desire to socialize with such, but that’s just me. Want me to leave? Fire up a joint, then run your head. The idiotic babble will have me exiting stage left in a hurry.
I usually just light a cigarette when I want someone to leave my presence. :)
It doesn’t work on other tobacco smokers though.
My ex got way into weed after we broke up, and first he got paranoid. Then after a couple years he became convinced that the ghost of Gandhi was coming to his room at night to talk about the end of the world in 2012.