This is a holdover from Capricon, many chairs of which ran Worldcon. The "Woebegon" track often has some of the best panels, but the participants are usually a clue as to the imaginative nature of the panels. I works better in the Capricon hotel, and the insiders know not to look for it. Not any relief for someone who has spent time and effort to find the non-existent panel, I know, but not maliciously done by any means.

SAMK