Chaosmancer
Legend
I didn't say it wasn't possible to stop PCs from doing awful things. The DM and the players can stop them easily. But if the DM and the players choose not to, there's no way to create a setting which will do it instead.
...I mean, I guess you could have a setting in which some immensely powerful psionic entity simply halted all such actions before they could be committed. Whether the presence of such an entity is more or less horrific than the absence of one is an interesting question.
Nothing exists in a fictional world unless the author puts it there. If the DM says that no NPC takes a certain action... then that action is not taken. It doesn't matter if you find that illogical, that is why fictional worlds are not the real world.
I can choose to create a world where child abuse is a thing that doesn't happen, without needing to create some entity that prevents if from happening, because I get to decide everything that happens in that world.