I thought that maybe once they launch AG3 and add the live chat there can be a *Cop* for the live chat. He/she as a *Cop* can view all chats to make sure no one can say inappropriate words. You mods can choose what the name of rank can be, and it would be lower rank than mods. A *Cop* can: Warn/Ban People, depends on what they said, from the Live Chat.
That'd be insulting to actual cops. They'll probably still be called moderators (if they actually separate chat and forum mods), but the staff haven't mentioned anything regarding chat rooms in a while, so I wouldn't expect it any time soon.
Plus we don't have enough trustworthy users capable of maintaining the level of decency and quality in chats as is evident in the community forums. To handle chats the admins would have to mod practically every regular.