I just got tagged for not having all of my neutrals pigtailed down in a plug box. I did have the 3 wire neutral and the neutral going to the other circuit (from the red of the 3 wire) pigtailed though, just not the other wire that is on the same circuit as the black of the 3 wire. This has always been good enough for the last 5 years I've been doing mwbc's. I just find that it is less of a chance of a wire slipping out of the wire nut when I only tie three wires together instead of four. Is this inspector just being difficult?