Privacy - why the Govt. wants privacy for themselves

Cory Doctorow has written a good piece about why you should be worried about privacy. Basically, it covers:

He also makes the point that you shouldn't worry about your privacy if you have nothing to worry about. That's why privacy was used when the Govt. wanted to present evidence in court about the UK's role in rendition to countries that advocate torture.

So, basically, privacy works when the state wants it to work, but not when you want it to.