Often? Perhaps, but only because by post 100, those threads have put forth EVERY POSSIBLE theory short of UFO's.
(Although I've seen those blamed too.)
This is a discussion board. I would submit that the media is not doing much better - after about a hundred interviews with "had-been experts" and talking heads - they pretty much cover the full spectrum of possibilities. Moreover, as each theory is posted on FR it is open to immediate "peer review and criticism". That would be refreshing to see on the tube. The tin foil theories here are typically shot down fairly quickly or ignored. If ignored - which many often do as it is futile to argue with those types - you get a "silent majority" - thereby negating any "counting of posts" that might reflect on what FReepers at large believe. Just some thoughts...