there are good cops and bad cops but a large majority are bad. anyone who sits on the side of a road all day giving people tickets for a job is almost guaranteed to be an asshole.
i wrote a 14 page paper on speeding tickets for school, had to be neutral. i interviewed two cops, a traffic engineer ,and a road engineer, and spent like 20 hours doing research, and even looking at it from a neutral point of view, its extremely obvious that cops give speeding tickets to bring in money. both the engineers agreed that if they were to make the traffic laws they would have NO speed limits on highways and roads where the average speed is above 35. lowering speed limits does not make the faster drivers slow down, but it makes a bigger differential in speed between the people obeying the speed limits and the people speeding. and in areas in europe and in the US when some states didnt have speed limits, switched to having speed limits, the average speed dropped less than 10mph on average, usually lower, and in almost every case the amount of accidents and deaths instantly increased.
montana's accident rate and death rate more than doubled in the year or two after they added speed limits, while the average speed dropped less than 10mph. this is mostly because of the much smaller speed differential, but a huge part is that more people used seat belts, drivers were much more attentive, and driver courtesy was much better.
so yeah fuck traffic cops, i have no respect for them unless they are pulling over the actual dangerous drivers talking on their phones, or hogging the passing lane going 5 under spacing the fuck out.
as far as other cops. i like the 75 percent are bad 25 percent are good "statistic" it really seems like most of them are just looking for any way they can give someone a ticket, and have no ability to use common sense.