well, i agree that your parents took this WAY WAY overboard. it makes me sad to think that there are still people out there, educated adults even, that treat weed like its cocaine. you will never suck a cock to get your next weed fix (bob saget ). I personally believe that putting a weed user in any substance abuse program is an insult to those that actually need it. I would say that you sit your parents down and talk to them about it. I reccomend having some sources on its A) non addictive nature, B) the myth that it is a gateway drug (it isnt), and C) any negative effects that your parents try to use against it. it comes down to this, they are your parents, you belong to them right now. Try to get them to see your side, but if they are still against it, I wouldnt smoke in the house, but maybe find other places to do it instead.

good luck, and be smart