I suggest that if anyone feels compelled to use someone’s preferred pronoun because not doing so could result in some severe punishment, such as losing a job, then consider using scare quotes.
Scare quotes in writing usually mean putting the word in question in quotation marks. For example, I graded “her” paper and “she” earned an A. Similarly, making the peace sign with both hands indicates scare quotes. In other words, these are someone else’s words that you are merely quoting.
A one-handed peace sign may be enough to convey the thought. Or, even merely emphasizing the pronoun. For example, “That was herrrrr assignment”.
Or you can just kick “her” in “her” balls.