[Ariya]

I tend to believe it because when I played the Korean beta of Ragnarok II The gate of the world, players had to fill in their identity card number to be able to get into the beta. That was not only because they only wanted Koreans to play the beta but also to prevent guys from playing female characters. Since they could see if the identity card holder was male or female you could only make characters of your own sexe. But off course lots of players just subscribed with their sisters identity card for example, so their system wasn't really waterproof.
I got my account from a graphic designer who works for a game developer.