I need to move where you live.. The cops in my area (rural) do not have good manners. I was stopped close to home once- The Deputy said “I stopped you because I thought you were going to run.” And another Deputy stopped me close to home and asked: “How long have you lived around here?” As if that meant anything. I told him “I moved here before you were born.”
A lot of that is from the 1970s. Because of a small number of police assassinations in the US by leftist radicals, the federal government encouraged police departments all over the US to change their philosophy from “Old West” to “SWAT”.
This meant frequently brandishing guns; an aggressive approach to “taking control and dominance of the situation”, even when it was not a control or dominance situation; that police should be aloof from the public, trained at the state level with federal guidelines, and interchangeable, so that an officer wouldn’t necessarily work in his hometown, but someplace where he didn’t know anyone.
The end result was a big upturn in police aggression and hostility to the public, to not distinguish between social classes in how they treat people, and a lot of police getting killed with their own weapon because they brandished it when they shouldn’t have.
The biggest mitigation to this disaster was the Taser, because it gave police some way of dealing with situations in a less lethal manner. But socially, the police lost a huge amount of public appreciation with the changeover.
Other disasters are everything from abuse of steroids, which is so bad the FBI and DEA frequently send advisories to police departments all over the US; to the unofficial policy of killing dogs, as much to dominate and control and punish as for stopping a real threat. There is also a decided lack of common sense, such as arresting school children for some minor disciplinary problem, at the behest of the school.