With this excuse of Revenge that is created when you damage a vehicle or when you kill it, many people fake Revenge.
Like a policeman who damages a vehicle or kills a criminal, the revenge of the Criminal is activated towards the Policeman who killed him, but it doesn't end there, after the criminal withdraws his revenge, he searches him for fun, and they start chasing the cops relentlessly, and this bothers everyone who plays fair.
And the rule NOT to hunt cops where did it go? As Mike says, this server is not RDM, DM or RP, but Cops and Robbers, with specific rules, and not all servers with this mode they are done as well as MCNR.
Maybe you have to do like the bounty, which is created when you are killed by that player, and the killed player can see the Revenge on his head of the policeman who killed him, and he disappears when the criminal withdraws his revenge or when the indicated time runs out.