Obviously one's behaviour has some influence, much like my grandma's habit of playing the slot machines for hours on end means she's seen more payouts from them than I ever will, and my habit of not driving at all means I don't get many photo radar tickets. But one of the infuriating things about them is that there's no way to know. Are not enough people speeding? Maybe the city will tune them to be super-sensitive to keep up their revenue stream. Did they make an error? Was it not you driving? Do you have some other excuse that would make a human cop say "oh, all right then, carry on?" Do they use the data collected to track people's movements or any other purposes? It isn't easy to find out. Automated law enforcement sucks, having surveillance cameras everywhere was a bad idea, speeding is already over-enforced relative to other traffic laws, and making law enforcement more inscrutable and arbitrary is not the best path to improving society.