For any World I was in with site-staff, I wouldn't want them ever going over a commish's head. I'd rather have them play it legit, waiting for complaints through the proper channels.
Besides, if the world didn't veto it by vote, it still might not be collusion. It's possible that the world chat posting and the trade were independent events. The trade could just reflect the character of the world....it's not anyone but the commish's place to jump in at that point.