The Constitution does NOT allow for anyone to choose to give up their freedom. This is because one who is willingly oppressed also must have an oppressor. Oppressors are in violation of the Constitution. (Think "king of England"- the reason we even have our founding documents, right?) So, you cannot choose to enslave someone NOR be enslaved. I think this argument about "we can choose to give up our freedom" is not supported by any of our founding documents or laws. Not one. Which is the lithmus test for what one "can do" in America. Not to mention it is pretty absurd construct when given anything more than lip service.