It's so clear now. It's all a conspiracy! J.K. Rowling, on behalf of her fellow wizards, has written what at first glance are merely very readable novels about Harry Potter and the world of wizards. Actually, though, the wizards and Lord Voldemort are real. Lord Voldemort is known to us Muggles as "Osama Bin Laden". The super-secret Echelon survellience network and Area 51 are just a cover to hide wizarding schools and Quidditch arenas. The delay of the release of the fifth Potter book is probably due to a squabble at the Ministry of Magic about how much to admit and how much help the wizards need from us Muggles.
Before you question whether or not I'm completely mad, somebody else has had similar thoughts. Does that prove or disprove my madness? Does it support my theory?