My 17 yr son does what he wants and seems beyond my ability to exert control over. He can be pleasant and responsible with his job and with school (struggles but trys to complete work and attends classes regularly) but can have a quick temper with extreme responses. I'm concerned because I know he is smoking pot and he refuses to stop or to see that it is a big deal, in fact he has done research on its benefits and chooses to believe that over the opposing opinions. I don't think any discipline or punishment I could impose would have any effect except to drive him farther away. I'm not sure how to handle this situation.