Gary,
Someone recently passed along a story, supposedly about your Greyhawk campaign and the origin of one of the demon princes. The story has the ring of plausibility to it, but I'd never heard it before, so I thought I'd ask.
The story goes that players in your campaign often ran afoul of Demogorgon by saying his name, which alerted him to their presence. To avoid this, they started calling him "You Know Who," which in turn led to your creation of the demon prince of Gnolls, Yeenoghu, to teach them a lesson.
Any truth to this tall tale or is it just a gamer urban legend? I'm inclined to believe it's not true but, as I said, it's not implausible given your love of puns and other wordplays.
Thanks.