Stick to the limits & no need for a camera detector?.
....In principle I agree with you but having a Speed Camera alert system is just that: An
alert which is a real world aid to driving more safely. They are called "Safety Cameras".
For example, with or without speed cameras being present I rigidly stick to the 20,30,40 zones and most 50 mph stretches but there are plenty of zones which keep swopping and changing between 40 and 30 limits and signs can be missed, so the result is that one can be caught off-guard somewhat unfairly. The alerts also serve as a reminder, although it is much easier to keep an eye on the large digital speed display of a PogoAlert than the OEM speedo dial (which is inaccurate anyway!). There are also plenty of areas where there are 60 and 70 limit cameras (usually Truvelo's) and I tend to use my common sense and judge the road conditions and traffic levels without necessarily sticking to those limits. SPECS and gantry speed cameras are other devices it is helpful to be aware of. Temporary speed limit zones such as roadworks etc should always be adhered to without question.
Awareness of mobile speed camera locations (in the 50, 60 and 70 mph zones) is perhaps the most helpful feature.