Not sure if we are still in the era of " Games propagate mass murder " journalism but just in case I guess Larian is better of not allowing murdering kids. I would straight up make it easily moddable but not make it possible by default.
It might be out of date, but I am pretty sure some regions would outright ban the game - I think that's why New Vegas didn't allow killing children. I do question why we can kill goblin kids though - they are definitely sentient enough. Perhaps, that's Larians way of giving players Fallout1 level of freedom through monstrous children?