Here is how I see it, you diconnected the wire. In order to for the receptacle to work properly, you have to reconnect the wire. Are they wires properly sized? As mentioned the NEC does not touch this likely because it would gutting a house just to replace a receptacle. At the same time the ground wire is your seatbelt in an electrical accident. Will it save your life? If there was PR on this like there is for AFCI breakers, you best believe they would get it into the code. Its funny how articulate the NEC is when it comes to grounding but really generalize on this and using FPN's for references.
If you extend a 14/2 circuit with 14/2 and you discover there is a 20 Amp breaker feeding the circuit? what are you going to do?
