"Letting teen drink under parent's watch backfires
Those who drank with supervision more prone to problems than those told to wait, study says
A new study shows that teens who drink with an adult supervising are more likely to develop problems with alcohol than kids who aren’t allowed to touch the stuff till they hit age 21."
It's likely that this goes for smoking pot....
age 21 seems like a long time to wait, but you could be saving yourself from Rehab, and maybe even saving your life.