Easy. Nobody. The extreme power this gives will corrupt anyone in the real world.
Some of these kids eventually grow up and meet people who are kind to them. They find positive lessons in real human social interactions. They leave their protective fantasy bubble behind. They eventually learn to seek justice where there was injustice.
Others never grow up. They end up seeking to fight injustice with a new form of injustice. Only this time, they get to be the tormentor.