Robert_Charlton - 9:50 am on Feb 14, 2013 (gmt 0)
There's anonymity, and there's pseudonymity, and both afford levels of privacy. Pseudonymity has a long tradition, and it can also convey reputation. I'm coming around to not liking anonymity in some situations because of its lack of accountability, which is often misused... but I'm feeling comfortable with pseudonyms. YMMV.
As for government... that's why I think Eric and a bunch of others would welcome legislation, though I assume that might depend on what the legislation ends up saying. ;)
Advanced thinkers I know who work in web apps and systems that require a considerable amount of personal data to function feel that there needs to be some sort of social contract if personalized systems are to become widely acceptable. Right now I worry much more about the government or about Facebook (or for that matter, LinkedIn) than I do about Google. Again, YMMV.