@Nezchan
I'm not sure this is good advice. Writing is a profoundly empathic act. Look at a Clockwork Orange, for instance. The human condition is a very universal thing. While it is true that representing a character like this should be done with a lot of careful research it's by no means undoable, and I do not see any good in arbitrarily making trans characters even more under-represented in fiction.
@Nezchan
I respectfully disagree with your conclusion. While it is good to take both approaches, excluding the well meaning is not the way to go.
@Irick If we want trans characters more represented in fiction then promote trans characters /writing/ that fiction instead of cis people half-understanding their stories and centering themselves as the authors who should be telling them.
We've been doing it the wrong way too much, and the results aren't so hot.