The link between marijuana and schizophrenia saddens me.
(Disclaimer for the argumentative: this is not to discount or ignore the many physical and psychological disorders {some worse than schizophrenia, some less debilitating} linked to many other legal substances, it just fits with the thread and I wanted to say it.)
To imagine going your whole life maybe self-medicating depression, for instance, with regular marijuana use, only to unlock a genetic predisposition to schizophrenia by fucking up your neurotransmitters...sad.
Marijuana can turn on that expression? I had no idea.