My daughter just had this "pronoun" thingy come up last week at her place of employment.
This "it", my daughter, and one other co-worker were all discussing a work issue when my daughter referred to the kook as "she" in a sentence, when the kook interrupted her to correct her and said, "hey {my daughter's name}, it's THEY, not her".
Here's the kicker.........this kook is married to a man and is the mother of two or three kids. So tell me, is this kook a she or her since she has had babies? Ya, I'd say so.
And it's not even proper English to use THEY in sentence like in this instance.
I won't be destroying the English language just to play along with their game. They/she/her should seek professional help.