The NSA vs. Facebook

In recent weeks people across the country have been railing against the NSA archiving of all sorts of personal data associated with them in it's effort to keep us safe from terrorist attacks.  However, everyday at this same time, people all across this great nation of ours share mounds upon mounds of personal data willingly on social media sites - Facebook in particular - with no thought what-so-ever as to what is happening with that data.  We trust that the "security settings" provided us in Facebook will prevent unauthorized persons from gaining access to information about us that we only want to share with "friends". 

Now it appears that whatever trust we had in Mark Zuckerberg and Facebook has been severely compromised.  It seems that Facebook has been keeping "shadow profiles" of us that contain more personal information about us than we have been providing and that for approximately a year a data leak exposed this data to untold numbers of people.  What damage this leak may have caused - or will cause - has yet to be determined.  I highly advise you to read the linked story for more information.  What I for one would like to know is whether this is the extent to which Facebook is collecting our personal data or whether this is just the tip of a very large iceberg.

So.  We have this massive data collection by the NSA being done to ensure our security with oversight by the court, Congress and the Executive branch of government.  And we have Facebook collecting unauthorized personal data to be used for undisclosed purposes with zero oversight from anyone.  It is all personal data.  It is all being collected but for very different reasons.  Why haven't we heard more about Facebook's activity?