Scottwax, I agree 100% with you.
I have immense faith in the inability for people to keep their mouths' shut on something so big. The fame and fortune that even a shred of "hard" proof would bring makes it inconceivable that a secret on this order could be kept.
And a conspiracy of this magnitude would require or involve hundreds of people who would have some "hard" evidence. You can't tell me that just one of those people would inevitably find it impossible to keep this secret!
Or maybe there are groups of an ever decreasing size that kills off all the previous other groups until there is only 1 person who knows the whole story left!
My faith in big mouths and glory hounds (i.e. see the media) tell me this conspiracy is impossible. Hell, if I remember correctly, didn't we have Bin Laden's cell phone number and we were using it to keep track of him until some moron at the NY Times published this fact and Bin Laden tossed the phone? These clowns will do anything for a story no matter the final impact.