Thought-provoking essay from Wired.com, on why exactly you should be concerned about the NSA spying on us.
This article convincingly rebuts those who say that "If you're doing nothing wrong, you have nothing to hide." Choice quote:
Too many wrongly characterize the debate as "security versus privacy." The real choice is liberty versus control. Tyranny, whether it arises under threat of foreign physical attack or under constant domestic authoritative scrutiny, is still tyranny. Liberty requires security without intrusion, security plus privacy. Widespread police surveillance is the very definition of a police state. And that's why we should champion privacy even when we have nothing to hide.