Caporegime
It's their gender. It bothers them enough to want to make a change. I get the feeling, in threads like this, that people like my dad who think everyone should be one thing or another think that it's a minor decision for these people to think that they're another gender. It's not. Why would you go through all that trauma etc for nothing? That's ridiculous.
This is why I am kind of torn on these issues. On one hand a mark on a passport is not at all important and is simply a representation of your biological gender whether you agree with it or not. Its not for you its for authorities. On the other hand I know that for some people this is a big issue in their lives and this might just be seen as another example of people not accepting them.
I also don't think that we should ultimately pander to every request on the basis that a very small minority might not like it. Far too many people are getting their own way on issues that are either non issues or because those in charge don't want to be attacked by certain vocal minorities in society. Things like taking down pictures/statues of historic figures because some facet of their behaviour is unpalatable under current ideas. Requiring that people use their chosen "noun" etc.
Either way, I don't have strong opinions on this particular topic but I can see both sides of the argument.