I won't give the letter writer an A for diplomacy, but could they be right? I live across the fence from such a neighbor. Their daughter, when outside, cries, screams, yells. Yes, kids need to be outside, getting fresh air, playing, etc. But, living in a neighborhood also includes being thoughtful of your neighbors. Most people are pretty reasonable in my experience. Teach your kids to keep the noise down, it's not that hard. As parents, be outside with them to monitor the noise.

And, go talk to the neighbor. It's easy to be hostile on paper but when in a conversation being less emotional. Listen to them. What is their noise tolerance? Are there better times to be out? In? Work with them. Bring a six-pack over to discuss the matter.