Originally Posted by
Moonshake
I might be wrong, but if the account has had a lot of of use on it to the point where it is potentially significant, a name change would be possible if you obtain permission from the owner of the original account.
You are not wrong. For example, even if ishi quit toribash forever that name would be under protection, noone could get a namechange to ishi(without permission) seeing how ishi is/was significant.