So we're not breaking any rules... And you want the Magistrates to punish us anyway? Why?
It is fully possible for
no single message to break a rule, and yet have a collection of a hundred such messages that is worth banning someone from the game.
OOCly, players are going to gossip and say bad stuff about other players' nobles, probably behind their back but sometimes to that player's face. You are free to feel insulted about this, but I dispute the notion that this is somehow an unfair tactic used to "win" BattleMaster. Please demonstrate how players OOCly saying bad things about your nobles impacts anything in-game.
Really? Players are "going" to do this, and we just have to take it?
It doesn't have to be about trying to win. The motivations of the players making the derogatory comments and the little jokes and laughing behind their hands doesn't actually matter one bit in a case like this.
What matters is the effect. If it creates an atmosphere that is deeply uncomfortable and negative for one particular player or group,
that is against the Social Contract. It doesn't matter whether you do it because you want to "win", or just because you think it's fun, and anything that's not solidly against the rules is fair game.