IMHO, I don't see the msgs as insulting or passive-aggressive. I see a player being critical and expressing frustration with a team mate. If you can't tell your team mate that you're pissed off at him, or that he's doing a piss-poor job, then it turns into passive aggression, like disregarding orders, ignoring messages, sarcasm, IC niggling, etc. From what little I've seen, there's nothing "passive" about Kai.
You can tell people that you're frustrated with them, or even pissed off at them, without being insulting, passive-aggressive, or calling them incompetent. Even saying something like "It really pisses me off when you do stuff like that, I wish you would stop it." isn't against the social contract. There really is a difference between criticism and insult. IMO those two messages, in the contest they were given, is clearly intended to be insulting/belittling toward the player.
