Well I consider myself lucky being a Canadian cause I got no problem with the police for the most part cause the RCMP don't murder people as far as I can tell. I wouldn't want to live in a world without law enforcement cause living in the real "Wild West" would be hella scary! I like not having to carry a gun and constantly worry that someone's gonna steal all my naughty word as soon as I leave the house! All thanks to, you know, Law Enforcement, and the Rule of Law in general. I also like not being worried that the local Lord is gonna kill me cause I looked at his wife the wrong way, also thanks to, you know, the Rule of Law, and Law Enforcement.
So nope, got no problem running or playing a game based around cops. Besides, I would run a game where the cops are, you know, good cops. And I would play a good cops in a game about cops.
That being said, if someone involved in the cop game I was participating in decided to be a bad cop...I would beat them with a shovel...and go to jail for assault, cause, you know, the Rule of Law, and Law Enforcement exist in my country and I am thankful for it!