I have neighbors who did the same thing. I told them about it and they just couldn't understand what the problem was. They said, 'If you encounter any mess, just tell us and we'll come and clean it.' I said, 'So let me get this straight. When I step in your dogs shit, I'm supposed to walk over here, knock on your door, hope your home and then hope you'll clean it up? I suggest we skip all that and you just keep your dog off my lawn.' Of course that didn't do anything so I called animal control, they stopped by, checked for license tags (you guessed it, none), grabbed the doggy by the scruff of the neck and carted him off. I waved. The funniest thing was that they have young girls who play in the neighborhood and I asked them, why didn't you just let him out in your nice, fenced-in back yard? They said, our mom doesn't like to do that because he poops in the yard. Tragic