Plate fuckery is pretty common with car enthusiasts. The other 95% of the driving population doesn't know or doesn't care, while all being too fearful to do something so blatantly illegal. I'd bet most drivers beleive they simply don't speed. Some still don't have a clue there are cameras or where they are.

Sample your local city's BMWs. Tinted covers, reflective spray paint, reflective letter overlays, plates like 11II1II1 or 00OO0O0, flipping frames, rolling shutters, a perpendicular mirror in the middle, scraped letters, a leaf, real-looking fake plates, perpetual out of state temporary tags, fraudulent temporary tags, or even no plates at all. Or somehow worse, the US has a SovCit problem and they run "not for commerce" plates.