In April 2008, The Orange County Register published a bombshell of an investigation about a license plate program for California government workers and their families. Drivers of nearly 1 million cars and light trucks—out of a total 22 million vehicles registered statewide—were protected by a “shield” in the state records system between their license plate numbers and their home addresses. There were, the newspaper found, great practical benefits to this secrecy. “Vehicles with protected license plates can run through dozens of intersections controlled by red light cameras with impunity,” the Register’s Jennifer Muir reported. “Parking citations issued to vehicles with...