Young adults need to know that attempts at social control will hurt them a lot more than marijuana could ever dream of. Both schizophrenia and psychosis are garbage-dump diagnoses. They mean that someone in "authority" doesn't like the way you think. Think of a scowling, pale, pock-marked face belonging to some thing that comes out of your worst nightmares. This is usually an overweight, wheezing white man whose mental makeup makes him think that he has the absolute right to rule over other humans no matter how much it costs them. There are other stereotypes who are psychologically similar. The more they are allowed to do violence to others to enforce their will, or what passes for their will, or what might laughingly be called their decisions, the more destructive of others they become. They are human parasites of the worst type. Some parasites only take your money. These people take your mind and soul.
They cannot operate nearly as well without the use of some drugs or situations to get their hooks into you. When I talk about people who have conned me and otherwise used me in the past, think about how they have done it. By physical or social restraint, physical or mental abuse, they induced some form of fixation on an idea. To do their work they had to make some idea, no matter how stupid and wrong, more important and more right within the context of that interaction than anything else that I might bring into it. This is like the practice of hypnotism, the hypnotist using his voice and other devices to focus someone else's mind on becoming as stiff as a board, becoming insensible to pain, or handing over all of his money to the hypnotist.
This practice is aimed at turning a person's own intelligence against itself, and it is unethical and damaging. One of their defenses of the practice is that people who take responsibility for themselves cannot be manipulated this way. That kind of defense is a smokescreen. Those people will do everything it takes, right up to finding ways to kill the individual that they are trying to control. Some people here can't imagine their own mother keeping a child believing that she will kill him if he doesn't "straighten out," all the while behaving so irrationally that her word on anything cannot be believed uncritically. She does this while her son or daughter is still normally expected to depend on her for nurturing and guidance. The same dysfunctional relationship holds between many citizens and their governments. The government behaves irrationally, as it does with the drug war, then demands recognition that it is right and the citizen wrong. It does so at gunpoint. People have trouble in America believing that their government will murder them for profit even while they see it happening.