Weed, etc. acts of rebellion, things they think make them look, or feel kool is the teenager's equivalent of a toddler acting out because he didn't get a cookie.Until the key problem of the psyche of this person is self resolved or resolved through effective intervention, they'll be ridiculously annoying and immature (blatant "I WANT A COOKIE!" immaturity isn't the only form of immaturity) in a way that they wont realize until maybe they "grow" out of it and reflect.
"If the world hates you, keep in mind that it hated me first." John 15:18
"True strength isn't determined by when a man has a lot and gives enough, but when he has nothing left but keeps on giving."
"A man is determined by the strength of his will."
"Courage has nothing to do with ascertaining any sense of certainty, but the will to go on even
in the face of uncertainty." - Arhk