Im all for LBGT rights. But if you are a tran then your driver license should reflect that. They should not just be allowed to roam freely without having some way of other people knowing other than their own disclosure. If they are so fine with their decision to alter themselves, then they should be just fine with have a T on their license.
Also this is an example of science going too far - its a double edged sword you know. It should not even be legal to provide sex changes IMO, but since its too late for that some kind of law should be in place to protect from confusion and possible murder.