"There is no killer answer yet. Jacob Appelbaum (@ioerror) has a clever response, asking people who say this to then hand him their phone unlocked and pull down their pants.
My version of that is to say, 'well, if you're so boring then we shouldn't be talking to you, and neither should anyone else', but philosophically, the real answer is this: Mass surveillance is a mass structural change. When society goes bad, it's going to take you with it, even if you are the blandest person on earth."
-Edward Snowden
"Arguing that you don't care about the right to privacy because you have nothing to hide is no different than saying you don't care about free speech because you have nothing to say."
"When you say, ‘I have nothing to hide,’ you’re saying, ‘I don’t care about this right.’ You’re saying, ‘I don’t have this right, because I’ve got to the point where I have to justify it.’ The way rights work is, the government has to justify its intrusion into your rights."