There are always bowls of water outside for any visitors as well as a bowl of biscuits at night, not to mention a couple of cat beds and a kennel for any wanderer!! They wander in, eat, wander out and seldom are there any squabbles. They all know the rules of this establishment!!!
I'd rather a stray animal comes to my place where they will be tolerated and treated well, even if only fleetingly, than go bug someone that might try to trap them, or poison them or just throw stones at them, or other things that I don't want to contemplate.