> Also privacy is like a thermodynamic arrow.

Running off on a tangent, that's a really interesting analogy. I wonder how much could be done with the notion that privacy is the opposite of entropy: that is, privacy is about minimizing the arrangements of how your information is formed, and there's a universal, inevitable trend towards maximizing those arrangements. Differently, privacy as the predictability of how a piece of information moves: as entropy, or publicity, increases the predictability of the information becomes less as its possibility space increases.