One of the most important features of basic
human rights, such as
freedom of movement, recognition and
equality before the law, and the
right to vote is that they must be inalienable: not to be taken away or surrendered, not even with the consent of the person in question.
The reason why this is so important is that if those rights were alienable, they would eventually become meaningless: if the free choice of employment could be surrendered, the result would be slavery (Can anyone say "debt-based wage slavery"?). If the right to vote could be sold, someone could simply buy a majority and do without all the unreliable lobbying.
Hm. Given those examples, it seems that we're already doing a pretty good job of making a mockery of the Universal Declaration of Human Rights in our supposedly "free" society.