I am with the OP! I also do not report with the exception of obvious speed traps that are not there for safety.
Munkatch, I don’t think your sevorah works directly – the driver will avoid this police officer, but will get speeding in other places. Also, many drivers are so machmir on police that they go half speed-limit, creating danger and bitul zman for tzibur.
There might be a case for posting fake police reports to slow down the traffic, maybe around the time kids go home from school? You can even post it in front of your own path to ensure safer travel. This is similar to gemorah Avoda Zora that recommends telling gazlanim that you plan to travel further than you actually do. It goes against sheker tirchok, though, not sure where permissible line is. Maybe if you see actual speeding traffic.