I think that, as the fight over 'metadata' implies, most people haven't realized how powerful non-central data can be. People who wouldn't tell you their home

I think that, as the fight over 'metadata' implies, most people haven't realized how powerful non-central data can be. People who wouldn't tell you their home address, relationship status, or buying history share that information with a dozen companies that collect it implicitly. Of course, we do make some conscious decisions to give up privacy - I don't give a damn who knows what I buy at the grocery store, so I'll have it tracked for 3% off - but a lot what people agree to isn't.