The government is already misusing its secret surveillance programs:

http://www.nytimes.com/2013/07/16/us/double-secret-surveilla...

Since this is apparently new information to you, I hope you update your risk assessment.

The government misusing secret surveillance isn't conspiracy talk, it's first order incentives. It would be bizarre if the data were NOT being abused. I'm a law and order guy, but federal prosecutors have a well documented history of playing as close to the the line as they can and dancing right over the line when they can get away with it. Since they're now trying to hide the line, this should be fairly scary to rational people.