I think I would recommend not letting him play. Possibly call 911, or bring him to a hospital.
Overloading an electrical socket could cause an extreme build up of energy and can cause a spark or even a huge fire in your house or any type of place. The minimal risk is that if the socket is overloaded it could damage the appliance plugged in to the socket.
If it's credible it usually will cite where it got it's information to avoid copyright bs
