For some reason my wife is a magnet for obnoxious children of all sorts - seat kickers, screamers, loud devices with no headphones, etc. Seems to happen more often when I'm travelling with her than when I'm solo - and almost invariably the offending child is right behind her on the plane at the beginning. Sometimes the parent(s) make an effort to correct it but too often they just ignore it or get defensive about the behavior.

It's not only travelling. Last year we took our teenager to a very small movie theater to watch Hayao Miyazaki's The Wind Rises. There were two showings - one with English audio and the other in the original Japanese with English subtitles. We deliberately chose the Japanese showing because our daughter has been learning Japanese for a few years and the wife and I don't mind reading subtitles.

Well one mother brought in two toddlers - neither apparently able to read, or to read well enough to handle subtitles. Presumably she didn't notice it was the Japanese showing. So the mom begins reading each subtitle to them - loudly. After being asked not to by staff, she stopped that but then the kids periodically would loudly complain they were bored and wanted to leave. They did end up leaving early.