The audio tape is piercing, and annoying, and absolutely identical to just about every time I've ever heard children playing in a pool. What you have here is a closely situated snobby "homeowner's association" neighborhood. One neighbor probably complained, then another one probably agreed, and the next thing you know, they're all talking, and everything gets blown out of proportion. In the case of a suburban "community" like this one, such as the one I live in, there are regular meetings of the homeowners which consist largely of people complaining about the piddling little things they aren't happy about. "The people we contracted to do all of our lawncare for us haven't been careful enough with trimming around my petunias!" That sort of thing.
I saw a case on one of those ridiculous daytime "People's Court" type deals a few years ago; it may in fact have been People's Court. A woman in a ritzy neighborhood was complaining that one of her neighbor's daughters had a boyfriend who would honk his horn loudly to pick the girl up. Aside from the fact that the girl said she didn't have a boyfriend, which angered the complainant greatly and, at one point, sent her into a spitting fit of contradiction, the complainant stated that she went so far as to attempt a "citizen's arrest, by lying down in my neighbor's driveway behind their vehicle when they attempted to drive away to avoid my making a complaint." This woman harassed her neighbors for months over what was acknowledged as being an "occasional" but "very annoying" horn-beeping which never happened later than 8 P.M. She also brought up how upset she was at "insults from the girls, who called me 'the crazy lady.'"
What we have here is a less severe version of the same kind of snobbish lunacy, people whose entire reality is based upon an expectation of some idealistic conditions which, by definition, can't exist for everyone, as it revolves around everyone else taking care to make sure said lunatic's conditions are upheld for them.