I once had an on-line encounter with someone who had a serious meltdown over people calling a mashed potato topped casserole variant made with ground beef shepherd’s pie. NO NO NO ONLY GROUND LAMB CAN BE CALLED SHEPHERD’S PIE was how the rant started and it only got hysterical and incoherent from there.
It would have been entertaining if he wasn’t entirely drop-dead serious. Amazing how worked up people can get about food other people are eating.