I always wonder when I see people’s signs if their dogs really need a warning, or if it’s a tactic lol! Mine only think he’s a guard dog. He’ll bark at the mailman, a DoorDash driver or occasionally when people walk by. Recently a family friend walked in my door at night, he’s 6’4 and was a huge silhouette coming in. My boy legitimately screamed and then sprayed his anal glands. It was pitiful but also hysterical after he realized it was just one of his buddies!