> I asked a young man working at the Target store how visitors felt about their every action being tracked and he said that they’d come to accept it. And that was that.

I think this is completely true. I've done research in this area, and people under the age of about 22 have no concept of privacy whatsoever (it should be noted that these people were 12 when Facebook started and basically hit their teenage years just as Facebook opened up to the general public).

Here is one of the anecdotes I collected: when one of them arrived at college, she posted a picture of her school ID and her key and said, "I've arrived!". I pointed out that with just the info in the photo someone could make a copy of the key and get into her dorm room. She said, "eh, that won't happen".