I was there, and we weren't all like this. I can remember being offended when a friend checked me into a location with foursquare, broadcasting my location out to the world. I felt similarly offended when I was "tagged" in photographs (and still am to this day).
This idea that we were all collectively oblivious and only recently made our way out of the fog really bothers me. Why did the majority of my generation never care about their own privacy?