Yeah, but then the cops had radar detector-detectors. And of course the war of escalation continued, with radar-detector, detector, detectors. and even radar detector-detector-detector-detectors.
Fun times.
As I recall, the goal was for the detector detectors to shut off once detecting that they were being detected, to avoid a ticket in places where detectors were illegal.
And in Ontario, Canada? One single company sold to the cops and people, in a war of escalation that left their pockets quite padded. Wikipedia says BEL-Tronics, Inc. of Ontario, Canada
Kind of the same game-plan (suspected) of antivirus companies.