What are these additional rules, exactly?
Common sense things, like launching denial-of-service attacks, or using someone else's account without their permission.
Warzone has been fine with players having multiple accounts on the same team in the 3v3 ladder, for example. Today it's unclear, with the rewording, whether that's still acceptable
Same team is OK. The previous rules said "don't use multiple accounts in a way that gives you an advantage". The main idea behind the re-word is to make "an advantage" more clear and less open to interpretation. I've had people try to claim they didn't get an advantage by multi-accounting in a ladder or tournament since they didn't happen to play themselves. But that's not acceptable, since the point of the rule is that they
could have played themselves so it's still against the rules.
joking on someone's clan thread (that you have rapport with)
Insulting someone in public is never allowed. Calling it a "joke" doesn't make it any better. You can say you have rapport, that they knew it was a joke, that they weren't offended, and that you're both OK with the insult. The problem is that you posted it in public. Therefore, anyone can view it, and the majority of people viewing it won't know about your rapport. They don't know about this private relationship that you have with the recipiant. All the public will see is hateful and mean things being said between two players, and if that is allowed to persist then this gives onlookers the impression that this is normal and expected and acceptable behavior on Warzone, which it isn't.
If you send them this in a private mail thread and they don't report you, then it's fine, since it's just private between you and them. In public you're always expected to follow the Warzone rules.
What is "excessive" profanity, exactly?
You'll know it if you see it. If every other word is profanity, for example.
Kenghis Ghan got a warning for using "WTF."
That is a lie -- I just looked through his report history to confirm, and there's nothing even close to that, and I've never been aware of anyone ever getting warned for something so minor. I don't discuss a specific player's reports publicly, but in other people's cases I've seen people lie about why they were warned before. People will often lie about why they were warned/suspended. Just like in prison "everyone is innocent", some people don't like owning up to their bad behavior and will deny deny deny.
