Time for a constitutional amendment?


A reader (in the comments to my post about being "open for comments"--scroll down to the third comment) has come up with a specific proposal: "...an Amendment to the Constitution, that states, "No Entity, May usurp, or negate any rights that are contained within the Bill of Rights; No Citizen, may give up these rights by contract or any other means."

I wonder what others think of this idea. Any reactions?