"Privacy, in other words, involves so many things that it is impossible to reduce them all to one simple idea. And we need not do so."
Privacy means different things to different people, and it's almost insultingly oppressive to attempt to superimpose your definition of privacy onto others. For example, my personal belief is that anything conducted in or seen from the public domain should hold no expectation of privacy. However, others might disagree with that assertion and deem me to be a government stooge.
Who am I to superimpose my privacy expectations onto them? Unfortunately, in a democratic republic, that's what we do every time we vote. That's what our leaders do every time they make decisions, and that's what PRISM and CISPA is all about.