"People are inconsistent about the kind of exposure they’ll tolerate. We don’t like to be fingerprinted by government agencies, a practice we associate with mug shots and state surveillance, but we happily hand our thumbprints over to Apple, which does God knows what with them."

Great point. People say they care about privacy but willingly Instagram and Snapchat and YouTube every minor detail about their lives.

Not everyone of course, but a lot. Facebook has what, 2.1 billion users?

There's a vast asymmetry between the privacy people say they want and in reality how quickly they'll give it up in exchange for free services.

But this article is a good legal history of American law.