I'd prefer the parent/guardian was told that they'd constantly have to correct the child (like, if you say anything like that, we immediately apologise to the people around us, explaining the issue, and take a 10/15 min break. That way the child may have a chance to learn what is and isn't acceptable in society. And if the adult was not prepared to help, then yes, they're banned until they can.You’ve provided the context of why the boy was so incredibly abusive. Tough call but would you prefer that he is not allowed to watch games at the Amex?