It's just a cat & mouse game anyway. If the government didn't want people speeding they would regulate the max speed of new vehicles to be 70mph off the show room floor with built in shut down for tampering with the car.
READ THIS
I read an article a few years back in Car & Driver about Arizona and it's running the read light cameras. It's all about the $$$, and a little safer roads. They actually moved the sensor further into the intersection so that if the light turned red, they had a better chance of getting a picture of you passing through the intersection. They basically took away the "commited to the intersection" gap.
A little something from another website related to Mesa, Arizona.
"Vendor, and term: The vendor was Lockheed Martin IMS, now ACS. The contract was signed in Nov. 1999 and runs until April 30, 2005.
Fees: Until June 1, 2001, the vendor received $48.50 each for the first 20,000 paid citations (combined red light camera and speed camera) per year (calendar year or contract year?), $39 for the next 20,000, and $21 for those above 40,000.
Beginning June 1, 2001 the two types of cameras have separate compensation schedules. The vendor receives $73 each for the first 900 red light camera tickets paid each month, $65 for the next 300, and $48.50 for those above 1200. For speed camera tickets, the vendor receives $51 for each one paid."