Ban Hammer IV
The only person he was afraid to ban from his office was his mother. It wasn't because she'd been gone for so long and he was afraid she'd disappear again. It might have had something to do with her tutting at him when he reminded Sokka that he was banned from his office and the kitchen. It certainly had everything to do with her glaring at him when he threw a Northern emissary out of his office.
It was easy to forget that she was as deadly as Ozai. He refused to be on the wrong end of her anger.