That is a good point, though personally I do think there is a pretty significant escalation between reading number plates on the outside of the car, and pointin

That is a good point, though personally I do think there is a pretty significant escalation between reading number plates on the outside of the car, and pointing a camera inside the car to judge what is happening inside. I also think speed cameras are problematic, because they seem to be more effective at revenue generation than improving safety. We know how to design roads to make them safer implicitly, including ways to reduce the speed, without just pointing a camera at the cars and mailing out tickets a couple weeks later.