You can take it that I disagree with the idea that a democracy should be able to get anywhere close to ruling on whether or not the individuals within said democracy get to live or die.

Your post does make an amusing (and very sci-fi) idea pop into my head though, that of fugitive, criminal immortals. The idea of an immortal hiding what they are isn't new - it's usually because they don't know how people will react, or they wouldn't be able to fit into society, or they might get experimented upon to find the secret. It seems at least a little novel to have a situation in which it is known that some people will live forever, and by the very nature of having taken on immortality they are necessarily fugitive.

I suppose it's not too dissimilar from some of Asimov's robot stuff.