I've seen this issue flirted with but not tackled head on.
If you are, say, a pre-op MTF transsexual dragging around a (US) passport with a female name and an "M" marker,
do you actually have a legal right to style yourself "Ms. Jane Doe"?
That is, would my employer who has made it abundantly clear that they regard me as male
have grounds for objection if I added "Ms." to my customer service style name tag?
I'm not really looking for opinions, more references to laws and court cases.