It would keep people who want/need to have separate accounts for a good reason (f. i. guild infiltration) from having to make another account... and if the spy is found out, the account can be deleted, freeing up the name for another player. Now, people who are doing what you said, Seytra, could probably be found out by ip if necessary. There should be some sort of thing to turn people away from making many separate accounts, such as when you create a new account you have to go through a \"newbie training\" map, but you can skip that when you create a sub-account.
Bah, I am just rambling on, aren\'t I?
josePhoenix