Parody By Hindsight?

Rex Hammock has a new twist on the fair use principle that says parody can be a defense to infringement (not to mention a powerful attention draw):  tell the world you're a parody if it seems like you really should be — even if that, er, wasn't quite the original intent.  This has legs, I like it!  Though they'd probably have to cancel the conference to pull it off.  A price many would willingly pay.