A constitution-free zone would allow slavery. This is a foolish idea. Nobody would willingly consent to become a slave for their entire life. A constitution-free zone would also create essentially another country within our country. Why would we decrease the size and power of our country in order to create slavery?
Of course they shouldn't be legal, as long as those "zones" are within the territories of the United States. I can't believe that this is even a question. Here we go again giving up our rights and liberties for a false sense of security. The Constitution should not be violated anywhere, by anyone, at any time.