Thugs pressure students caught selling pot into undercover buying for the thugs, and sometimes the students get killed.

Most Americans don't think of selling pot as antisocial, and neither do these students. They don't know how to move in the circles of hardened criminals.

Unlike hardened criminals, they are not accustomed to betraying people. Being set to cause the arrest of others like themselves must do them lasting moral damage. They must think that honesty is beyond their reach.