Instead of it being called "gender" it should be called "sex". After all if you were born male you are male and if you were born female you were born female. Being female and dressing up like a male or getting a surgery doesn't make you a male. It's the same with males that want to be female. The only thing you end up doing is making yourself look like a creep.

And for the users that we know are male or female that have their "gender" as the opposite should have it switched to what they are and locked. If God intended you to be male or female then he would have made you male or female when you were developing in the womb.