Hmm
I have a cousin who developed schizophrenia after a few years smoking weed. No previous mental illness in his family. Anyway the Royal College of Pyschologists say "Over the past few years, research has strongly suggested that there is a clear link between early cannabis use and later mental health problems in those with a genetic vulnerability - and that there is a particular issue with the use of cannabis by adolescents"
(Smale is stuffed, Sun 19 Sep 2010, 18:56, 1 reply)

Correlation does not equal causation
I.e. still hard to tell whether the heavy cannabis use causes the schizophrenia or whether it's a warning sign that full-blown psychosis is on its way. Still a sad waste either way though.
(littlesunshine licked your blinky diodes on, Sun 19 Sep 2010, 19:14, closed)