The Maximum Charge of a Black Hole

According to general relativity, there's a maximum charge that a black hole can have. And if you manage somehow to give it more charge than that, then effectively, there will be no event horizon. As the charge grows, the radius of event horizon shrinks and shrinks until eventually it's at zero. That's what we call the maximum charge, the extremal black hole. If you somehow added another electron to that, nobody knows what would happen,. Would you get a naked singularity? Would we all go to physics jail? Nobody knows.