That sounds less useless and more incredibly dangerous.
- What are the FoJ's moral paradigms?
- Why is the punishment for any misdeed uniform (punching), rather than fitting the wrong?
- Does it have any priorities, or does it just punch whoever's nearby?
- Will it start heavily policing peccadillos of the weak while ignoring the massive crimes of beings that could more easily fight back against it?
- Isn't it just going to teach children that they should try to solve all their problems with hitting?
Those are just the first questions I thought of about such a disturbing device.