Sorry but I call bollocks. You said numerous examples. Now you either have a large number of friends who happen to be police officers or are in the police yourself. If it's the former then your friends must be the unluckiest police officers in the force as they all suffer this crime. If the latter then again your town or City must be the unluckiest in the country. The full weight of the law would come down on such a crime as it threatens democracy itself. As such instances of this happening would be big news, even if they happened in a rural hamlet. Most criminals play the game. They accept being nicked is part of it and bear no animosity. They also know to go down that route would mean a whole heap of shit following them around as every officer in that area would be permanently on their case.