Remove old characters

There are many character names taken. Not sure, are they in use, or are they there for 15 years abandoned as they forever will be. If an account is not used for over 4 years (was not used in this ladder as it was not use in the previous ladder either), please rename all characters on those accounts to free names. Renaming example: aabccbaarthz or other char-translated numerical values, not a hard thing to create even millions of names.