So you have a squelch list and the guy that was squelched changes his game ID. Ta-da. Then the newbie comes along that likes that old game ID (not knowing a thing about the history of it) and grabs it, but no one will talk to him. Awwwww, poor newbie. With no one to talk to, he cancels his account thinking everyone in the game is a snobby numpty.
Next you will suggest for us to keep a list of all the game ID changes and send them to your computer so the game on your computer can check for any game ID changes in the list and correct them. After 3 hours and thousands of names being downloaded, you can then start playing again, until someone else changes thier ID.
Gee, that sounds like fun.