Explain to your parents...

You should explain to your parents that Thomas Jefferson and George Washington both grew and smoked marijuana.  Ask them if they would kick Thomas Jefferson and George Washington out of their house.  Then indicate, in a mature and reasonable way, that they are small minded, historically ignorant, and ill suited to the profession of parent-hood in general.  Indicate your relief at being freed from their tyranny of judgmental, intellectual nothingness and depart with your head held high.