First of all, I think the starting reps should be slightly adjusted to avoid this all "police tag any id" mess.
Secondly, depots and NPCs are part of rep fixing. It's not really OORP if nobody notices/cares. For example, if a Rheinland cruiser came to bering to shoot npcs for fun, and players noticed, then it'd be pretty OORP. If the other players thought he was just rep fixing, it's a necessary oorp activity so they should leave him alone.
Xoria (I think) had an idea to have depots of every faction in Conneticut for players to rep fix on. I think that's a good idea, and a bunch of Police depots definately need to be placed there:).