What NEC article does your AHJ cite in his disapproval of this?
I pigtail too, but other than only the neutral of a multi wire branch circuit it is not required by the NEC which is what the original post was asking.
by dturner
Additionally I do realize that the device is the weakest part of the circuit and that not using it as a splice has its advantages but I am strictly interested if it is against the code to do it.