I suspect that his appearance carries with it a certain deterrence effect, but the notion of an unfriendly human being falls very far outside the poor creature's Weltanschauung. It would no more occur to him to confront an intruder than it would to you or me to trample a toddler who happened to wander onto our premises. His likelier response would be "Hullo. Do you happen to have any doggie treats in your pocket?" About the closest I have ever seen him get to hostility to a human being is merely snubbing same.

I'm happy to have the deterrence effect, but since dogmo generally accompanies us when we're gone, I'm disposed to rely upon the simulated presence of citizens moving to and fro and lighting their way.

cordially,