According to that article they don't

> I am here to tell you: The emperor is naked! Don't make a fool of yourself, as I regularly do. After years of trying to see the luminescent gills I have reached the obvious conclusion: mushroom authors are out to make me feel like an idiot. And don't bother sending an e-mail to tell me you have seen the Jack O'Lantern's glowing gills, or to send a photo of the phenomenon, because I will know you are part of the conspiracy, and that the photo was produced by the same people who made the photos of the Loch Ness Monster.