ACLU sues Fairfax police over license-plate data collection

"Jeffrey Vagle, executive director of the Center for Technology, Innovation and Competition at the University of Pennsylvania Law School, said government data-collection programs have been “a big, back-burner issue,” as more people become aware of how readily-available surveillance technologies are being used.

“A case like this could open the floodgates, and the more people start to understand about how this technology works, I think more concerns and more questions are going to be raised in other jurisdictions,” Mr. Vagle said. “It would not surprise me at all if follow-on litigation on these issues unfolds in other places.”"