I discontinued a conversation. If someone continues said conversation, that's called insubordination; someone is not following orders.
We've established something as fact. For someone to come into the thread and say "so what," essentially reviving the conversation, would be pointless. So, doing what I'm supposed to do, I put a stop to the continuation. From that point on, if anyone continues the argument, it's considered insubordination.
...not "pulling rank."