You are missing my point. If the person hasn't had an active acount for like 6 months then why save there name if you a merging servers? If you have a character and you play I dont want your names. Its not like I get a choice to find a server where that name is avaiable.
Years ago MMOs use to clean up name lists all the time. Heck a really long time ago they use to wipe you character (I don't want that). But if you are essentially forcing people into character transfers at least clean up the servers you are moving people to.