Yeah, seems that negligence is a good reason for losing your permit. If you leave your gun lying around where others, especially kids, have access to it, then you have to pay the consequences. At least no one was hurt or killed!
In Koda's first link, the ccw holder was using deadly force on someone who was fleeing. He is not a cop and even the cops are not supposed to shoot at fleeing suspects.
The ATF should be a convenience store instead of a government agency!