> Potentially criminal groupls: everybody.

While this may be true, certain crimes are seen as worse than others. And, as un-PC as it may sound, certain demographics are many times more likely to commit certain crimes.

Homicide: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6227a1.htm

Also, some government monitoring can be "for your own good":

Youth Risk Behavior Surveillance: http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5704a1.htm

But, maybe the CDC is different than the NSA.