In a book series I read as a kid, part of the story is set near Zeus' abode. Zeus being, among other things, a thunder god with a significant ego, objects to anything being louder than he is. Unsurprisingly, however, he has no problem with generic violence, just with gun-based, IE loud, combat.

The solution his guards find is to use gyrojet rounds, which are said to whistle rather than bang. Rare in real life (I think I saw Ian fire one once), they're common in this world. I always thought that was a cool little detail.