This is something I did with my friends in Grid in the freestyle drift area. We would have everyone drive the Charger SRT8 drift (cops) except for 1 guy running away in the RX-7, Corolla or Silvia. The object was to find and destroy the rogue, before the 7 minutes ran out and before all the cops got totaled. Of course, this kind of game mode requires very little enforcement in BeamNG. Just that no respawns are allowed during the time.
These are all good ideas, but this is a simulator, not an arcade game. What the developers want to focus on, is the realistic soft body physics simulator that this game is.
We would love to have cop chases in the game, when we're ready to add them. We still have so much work though before we can start adding gameplay.