There are several products on the market that claim to block license plates from being read by cameras, including:
number plate covers which are designed to protect your vehicle licence plate from speed cameras that are aimed at your number plate from various side angles.The Super Protector license plate cover "silver ghosting" effect cover half the number plate making identification impossible.
Once sprayed on your license plate, PhotoBlocker’s special formula produces a high-powered gloss that reflects the flash back towards the camera. This overexposes the image of your license plate, rendering the picture unreadable.
a special low profile license plate frame that emits a high intensity IR light that is projected onto the plate and effectively blinds the device's camera.
Do any of these countermeasures work?