As this is the SITE FEEDBACK forum, you might want to post at the General Discussion-forum instead. ^^;

As for the topic itself, yeah, unused names should be freed after some time. I can't remember if it's anywhere clearly stated, but I think there is such a feature but as long as the content ID is active, that would not happen fer sure. I'm not sure if the content ID itself for the character needs to be active, or just the account...

But I do think I remember that there is a kind of a system in place for this. My memory isn't always of course in the right, though.