Nice idea, but only usefull if you are deliberatly going out of your way to flash the camera.Most want something to help if you accidently go past a camera just over the speed limit , like most who get caught are doung, 37 in a 30 etc [ANGRY][/ANGRY]
What you want is something like photoblocker, click on the link
http://www.photoblockeruk.com/
this is supposed to put a HIGH shine on your plate that reflects the light back to the camera so it cannot pick up your number,
this is illegal to use but pretty much undetectable,not that Id use it , but you can get it off Ebay ;)