So we have these neighbors, they seem nice enough but they have a dog and they walk him to all of our yards EXCEPT their own for him to do his business and they never clean it up! I have to dodge crap on my way to my mailbox and I can't let my kids play in the front yard without worrying that they're going to step in it. And it's not like they even take him for a real walk. They just walk around to 5 or 6 houses and wait for him to crap and then take him home. I am either going to write them an anonymous letter or put a no pooping sign in my front yard but I'm not sure which one to do. Do I write a letter or do I just put up a sign?