K so Zuko's kind of in a tight spot, having had his go at the evil thing and ruining his street cred by turning good (again.) Because now he has to let everyone bully him and like shove him into lockers and take his lunch money or whatever. If he fights back, or even argues, Katara's just a hair away from feeding him to Appa.
I'm waiting for a scene similar to this to actually happen. x)