Thank you for your extensive comment @wordsword! I absolutely agree with you. A nice gesture or attitude doesn't make a good cop. I always tell my children they can be anything they want, but if they'd come to me telling me they want to be a cop or join the army, I would feel that I failed them in raising them. And I'd put my foot down so they wouldn't do it.

And yeah, there wouldn't be any bad cops if there were good cops. The only good cops, in my opinion, are no cops. Anarchy. We can manage to 'govern' ourselves.

That being said, my stories were more meant as a metaphor.
This works in general. Being nice will get us much further in the long run than always being rude or nasty to people.