No, not at all, MPOE-PR was banned for receiving a formal warning to stop spamming, and then insulting Maged in response. You don't get banned for insulting mods, just like how mods are allowed to insult members. Its a two way thing. You can however get banned for disregarding a warning.

Inaba yells and insults everyone, but they are also yelling and insulting him. You can get banned for excessive personal attacks, however in Inaba's case people attack him and he attacks them back. I'd call that an argument.