People throw their dogs outside because the dog is getting on their nerves, and they dont want to have to deal with the problem. They dont care who the dog bothers, just as long as its not bothering them. If the dog becomes such a huge problem, you can call animal control on them, and they will take action, as this is a part of animal neglect. These people shouldnt have dogs if they cant take care of them. If they put these dogs in obediance class, they could solve these problems VERY easily.