Miata Front License Plate holder

I personally believeall this crap is a matter of collecting more
revenue. Police officer operated speed traps are being replaced by
speed light cameras and red light cameras at an alarming rate.
If is as advertised this product called PHOTO BLOCKER SPRAY is our
salvation. They claim that it was tested by the media on their website
www.phantomplate.com On the videos it shows the police saying that it
really works by making your license plate invisible to traffic cameras.
Can anybody tell me if this is true?
www.photoblocker.com please let me know what you think.