J.C.
I have not, but only because the one time I had an issue I felt needed addressed the office staff was able to take my concerns to her and it was handled without me needing to "move up the chain".
The issue was a sub teacher they were having for a week in my son's math class (4th grade). My son has his own sense of style and wears his hair very long. He is never offended if someone accidentally calls him by female pronouns because he understands that, since he presents in a gender neutral way, some will make that mistake, but that they should be respectful of him and use the correct pronouns once the mistake is pointed out. Well, this teacher called him "missy" (which I don't think is appropriate for boys or girls to be called by a teacher) and then proceeded to call him by female pronouns 3-4 more times even after being corrected, at first by my son, and later by many other students in the class. One boy was so upset he told his father about it and his father contacted me, this was in addition to my own son telling me about it. He was not overly upset, he just sort of brushed it off, but knowing it was bad enough to upset even other kids in the class, and knowing how stoic my little guy tends to be, I felt I needed to call the school.