I had a potential post about this on my mind last trip. We monitor as required at all times, however…
Those who are on a quiet frequency and decide to broadcast on 21.5 for fun things, I don’t think you realize that others monitoring guard may be also talking/listening on a very busy atc frequency at the same time.
Last trip I missed what atc was saying on a slammed approach frequency, because of unnecessary audio on com 2. Of course, when that happens, com2 gets muted in order to hear atc which defeats the purpose of monitoring. (Once com2 is turned down or otherwise muted, guess how long til that is remembered and turned back up?)
Anyway, I’m a huge proponent of fun and games, but discovered what the misuse of guard frequency is doing.