Once I got rid of my radar detectors, I stopped getting tickets. Cops will almost never give you a warning if they see a detector in your car. They are a false sense of security like mentioned above. Not to mention with instant-on radar they are pretty much useless...once it goes off, they've already got you!
Also, if you are nabbed with VASCAR (basically RatexTime=Distance), it is all done with math. It is pretty common here in MD. Ever notice the hatch marks on the highway....cops use them to time how fast a vehicle drives between them and uses a computer to calculate your speed.