what are you talking about? this is not a hard drug, this is a natural plant that grows in the wild with or without humans. there are no known mental problems associated with weed, other than getting a bit paranoid when you smoke thats about it. i know hundreds of people who have bin smoking for years and some that have just started and none of them have any mental problems that you speak of. they also vary in age, from young to old, I suggest you do some more research before stating negative comments on this natural plant.