As I recall, it was Webster Tarpley, retailing at least three different versions of the story of a "false-flag" operation, who blew the whistle on this. No proper evidence or sources or facts in any of the scenarios.
However.
Now that it hasn't happened, our premier woo-sayers will be right there, saying "ah! it would have happened - if we <heroic NWO-defying gladiators of Twoof> hadn't pre-empted it!"
Mind you, if it had happened, I imagine they wouldn't be on-line any more, and their last postings would be along the lines of "OMFG its real!"