I found exactly one instance in this entire forum of a CT ever calling LNers “sheeple”.
“Common usage” 
I'm definitely
not going to get involved in this row but just as a POI, before the forum was hacked the term 'sheeple' was indeed a common reference to an LN, along with the term 'parrot'. Never, at least to my knowledge, was the term 'lemming' used. My personal reaction to being called a sheeple or parrot? BFD ~shrug~ I've been called a lot worse believe me.
PS Any chance of you two calling a truce soon?