By nature, I’m somebody who probably errs on the side of openness rather than paranoia when it comes to privacy. I’m also very aware of how fortunate I am, though, to live in a country and under a government and legal system where I can afford to take this view.
Glenn Greenwald’s excellent TED talk gives some other reasons for caring about privacy.
There is, though, I think, a balance to be struck here; it’s also worth mentioning that complete privacy and anonymity doesn’t always bring out the best in human nature. There’s a reason why people wear hoodies, and there’s a reason why newsgroups that allow anonymous posting are often filled with trolls (at best), and vicious bullies (at worst). It is important that many of our activities are subject to some peer review, at least, if not legal or governmental review. Also, investigative journalists, of course, tend to assume that they and their commercial backers are somehow entitled to monitor people’s private activities, where other commercial interests or democratically-elected governments are not. Overall, though, I think he’s on the right track.
He also hints at something I hadn’t previously considered: that my religious upbringing might make me more accepting of constant invisible surveillance than I might otherwise be! Now, getting some real statistics on that would be an interesting sociological study…