> "Consider that many people don't see Facebook as a privacy issue once they've weighed everything carefully and not because they're idiots."

I'm not so sure about that. I'm reminded of the recent article & hubbub about the "Girls Around Me" app. My takeaway from that was while people are aware they are exposing all their information, they are ignorant of the myriad consequences and implications until they are directly confronted with them.

And in many of the scenarios the Cassandras are warning about, those moments of realisation tend to be past the point of rescue.