It's time for him to man up and go get some professional help. Part of smoking dope is being willing to accept the consequences of doing it. Even when it becomes legal everywhere -- and it probably will -- it will be divisive among people. Do him the favor of his life and stop enabling him to hide at your house without even trying to help himself.

This is the way I see it, and I offer my comments with all sincerity. Your son is too young to throw his life away on inactivity.