When we're deciding whether or not to intervene in a situation, the first question we tend to ask ourselves is "Is this person hurting anybody?"
If we find that the answer is no, most of us are happy to just mind our own business.
Unfortunately, it seems that some people are simply incapable of doing this and the second that something seems weird or different from their tastes, they make it their mission to put a stop to it. If they aren't having fun, then nobody else can either.
But while it's usually best to ignore these people's complaints, they can sometimes find ways to ensure that isn't an option for us. Usually by complaining to someone with authority until that person reaches their breaking point.
And a situation like this has led one mom to get creative with one big open letter after a neighbor rained on her kid's parade.