"If you've done nothing wrong, you have nothing to worry about."

Oh, really? Some cognizant responses via ask.metafilter.

http://ask.metafilter.com/mefi/39312

"If I'm not doing anything wrong, then you have no cause to watch me."

"Because the government gets to define what's wrong, and they keep changing the definition."

"Mind if I make a video of you fucking your wife then?"

"That's not what the Constitution says. You should read it sometime."

"So you trust the government completely? Not just this administration, but all of them? You trusted Nixon?"

"So it doesn't bother you that within the last few years the US has held a few hundred people without charge or access to the courts, and then released them when it decided they'd done nothing wrong?"

"So it doesn't cause you concern that people are released from death row all the time after it's found they've done nothing wrong?"

"In the Maltese Falcon the district attorney tells Sam Spade, "If you have nothing to hide, why are you concerned?", and Sam answers back, "Everyone has something to hide.""

For those who brush those reasons off I tend to ask a few very personal questions... "How much money did you make last year?" "How many sex toys do you own?" "Your wife, does she spit or swallow?" That kind of stuff tends to drive the point home that most people have stuff they'd rather not have everyone know.

"You're right, the government would never make trouble for an innocent person. I'm just going to call the Department of Homeland Security and tell them that you're a terrorist who plans to blow up the White House, okay? I'm sure it'll only take a few minutes to clear up the misunderstanding."

"And all along I thought you were a conservative who didn't trust government, didn't like big government, and believed in limiting the power of the state. When did you change your political philosophy, and why? Does this mean you'll start voting differently, too?"

"No person shall be ... deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation."

"If you've got nothing to hide, why don't you post your credit card statements on the Internet?"