Kathryn Miller​ is fond of telling the story of the first D&D game I GM’d for her. The players were hired to clean out a kobold infestation in the local dungeon. I had mapped out the whole kobold village, including kobold children. Her paladin had a crisis of faith and became a cleric. The group was a lot more careful of their mission choices from then on. I hadn’t set out to problematize violence in fantasy settings, but it sure made an impression.