Came across something called "NoPhoto" and it flashes a light to obscure the plate.
Only thing that really works, per my research, but $399.00 per "frame." IDK.
I am not in the habit of blowing red lights, but here in CA it is $490 if you do +1 point.
Came across this site that is amazing...
http://www.photoenforced.com/us.html#.WzQ62i0pnu0
Put in the zip code of wherever you are & it has all the locations of red light camera's, speed camera's & something I never heard of before, License Plate Reader Camera's (there are a ton in my area). 1984....