As a sub I had one student, a female emo/goth looking, refuse to answer to her name on the list. One young lady finally came to my desk and told me she goes by something completely gender neutral. Ok, didn't mark her/him/whatever absent but was tempted...I refuse to use a plural pronoun to refer to a single person.
I was subbing at the high school last spring and actually had this conversation with my old English teacher. Turns out she's not near as liberal as I thought she was in high school!
Don