Which reminds me of a story of a friend of my grandad's. Couldn't get the local LEO's to pay much attention to the petty thievery going on around his place so he put up a sign on his shop (he rebuilt starters & generators) that read: "Caution: Set-Gun. Do Not open door." One of the deputies saw it and told him to take the gun down, that was illegal. The deputy was handed the keys to the door a told to "go ahead".