It’s been my experience that the way cops approach traffic infractions varies widely by area. In western Mass, there are speed traps everywhere, and it’s a “cat and mouse” game between the cops and the drivers. One cop (who I knew personally) told me that in his chain of command the number of violations they wrote were (unofficially) monitored as a part of their performance. Too few meant a poor performance report. I got my only truely bogus ticket in western Mass. Tried to fight it, but the so-called “court” was a joke. They did reduce the fine, however.
Cops in NH have always been great in my experience. I did receive one ticket in NH and the cop was polite, professional, and advised me to fight it. He was part of a two-cop speed trap team, and he said basically that I was going over 20 mph over the limit (it was true) and that he really had no choice but to cite me.
In over 40 year of driving, I’ve only received three tickets, one of them bogus, one of them technically correct (although the area is set up as a trap), and one legit. The two first were in western Mass, the last in Bedford NH.
One thing I always taight my kids is that when a cop pulls a car over, he has no idea what he’s facing. It’s important to behave in a manner that allows the cop to realize he’s respected and in no danger. Once he relaxes, the tension drops and he’s much more likely to be reasonable.