Debating this the other night, my wife brought up the usual "But if you have nothing to hide, what do you care if the police want to look in your car, or if the government wanted to listen to my phone calls? Or if you have a bunch of money, you might be up to no good."
I can definitely understand that viewpoint, as I also have nothing to hide, but it's still maddening to me that anyone would be so willing to give up their constitutional protections so easily. Not to get all tinfoil hat paranoid, but I tried to explain that while we currently have nothing to hide, it could be a different state of affairs if we found ourselves living under a government we did not like, and instead of my wife discussing the latest gossip on the phone with her friend, she was instead saying how she thinks our government stinks. Then she's "detained." It's a dangerous slippery slope argument that can easily turn into what looks like paranoia, but there are a million tiny steps along the way to giving up our freedoms, and at some point you give up too much.
I mean, WTF, it's not that far off to see how people are routinely whisked away in Moscow or China if they have anything negative to say about government; have their property taken away, be put into "protective custody", and so on. Our country is amazing and nowhere near that state of affairs, so it's a ridiculous comparison, but I'd say that's due in large part to our culture and history of protecting our rights so dearly, and standing up to abuses.