There is an article on the Big Bad Wolf. 

 Isn't it self-evident? Dogs become dangerous animals if they are mistreated or threatened, and dog teeth can do considerable damage to human flesh. The claws can lacerate flesh, and infection is a possibility with any animal bite or scratch. Dogs can overpower people with falls that can cause bone fractures. Dogs are much better-behaved than any other animals capable of killing and eating people... but where human stupidity meets a large predator, tragedy is always a possibility even if the predator is ordinarily well-behaved. The threshold for retaliation from a dog is far higher than for bears, wolves, cats, hyenas, snakes, seals, or crocodilians; in some cases, simply passing by makes one prey to some of those killers. Dogs know better and usually avoid confrontations, but even they have limits of tolerance. They defend themselves and their companions forcefully. 

 You wouldn't throw stones at a large dog, would you? Such is either amorality or profound folly. QED.