Cameras would allow more officers to do things that really counted, like catching murderers, instead of worrying about jaywalkers. Technology is hard to resist. And it improves. A year or so ago I did a story for a high-tech journal on a company called Photobit, which makes the light sensors for digital photography, scanners, and suchlike. They had found a way to reduce costs a lot.
Complete cameras end up being very small, durable, simple.
You could build them into stop signs. There is no ill-will involved here, no nefarious design aimed at turning us into an electronically monitored society. But-think of the wonderful possibilities. For a decent engineer, it wouldn't be hard. And photograph license plates.