<< I should be largely invisible to the enforcer class.
The genie is out of the bottle. My health suffers if I think and express myself like you just did, although very eloquently. My roots are academic but my current state is prole. (ever read Fussell's Class?" [1] It is WONDERFUL!)
<< far more threatening to me than individual criminals.
I disagree. If you ever lose a relative to a gun or a drunk or cocaine, then storing a googol of data on me is never as threatening.
<< Any tool that can be used for legitimate police work can also be used for political oppression.
Maybe because I am political only one day of the year (or 2, depending), the day I vote, I do not feel oppressed.
[1] http://www.amazon.com/Class-Through-American-Status-System/d...