These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Moral Event Horizon: The beastmen go screaming across this line when they burn captured Roman soldiers alive inside wooden cages.
Commodus jumps across this when he brutally stabs Oswald to death in front of his daughter and hundreds of his people, and then has the gall to demand that everyone kneel before him. Fortunately he gets a rock to the face for his trouble.