oh, i am familiar with people who have mental illness's - from slightly affected to totally disabled.  i don't think the problem is the marijuana itself. from what i've seen,  the mentally ill person uses a touch of marijuana and then it's open season as if they had gotten permission to go off the deep end with heavy use of a variety of substances.  people fool themselves and every brain is different.   i think alcohol has a much more devastating effect than marijuansa