I had always imagined that this rule was intended to be a backup and "catch-all" rule that our administrators could use to facilitate the sanctioning of a person who had discovered a way to be malicious, evil, or otherwise unpleasant while still remaining within the server rules.
The human race is an ingenious one, and one should always give them space to come up with yet another inventive way to be bad.
Thus, it is well that our beloved administrators have a backup plan to be able to effectively sanction anyone they need to, especially if no other rule covers their transgressions and/or idiocy.
~ I always posited that this was a cunning Plan B.
