Facebook privacy settings: Who cares?

I think it's true that privacy issues don't have the power in themselves to drive a Facebook exodus, but I believe that a strong competitor will be given an unexpected boost by this controversy. I think this report seems to indicate that possibility.

If Facebook really have 500 million users and if the guy who scraped all the publicly searchable profiles (171m) really got them all then a staggering 329 million people care.