The thread should have never been opened in the first place. There is a live commentary thread for stuff like this. Even if the match is over, and the mod caught it late, the thread was against the rules to begin with.
But, what you said makes it a mod error. It's like a umpire making a call after the match is over. It may be correct, but it came too late. So, can I start a new thread, about Petra, the bug killer, now that the match is over? It was quite humorous