My I say that I think that this is an absolutely terrible idea, and not at all the sort of thing the SDMB should be getting into. It could seriously unbalance the board, and lead to the demise of everything good about it.
I have nothing against individual posters occasionally posting OPs of debunking material, as LavenderBlue recently did, and if Cecil or his paymasters wanted to do it as part of the main site, that would be a different matter too, but it should not be institutionalized as part of the message board. To do so would amount to imposing a “party line” opinion on any discussion of the relevant topics, and would suggest that all board members and “guests” either do or ought to subscribe to the debunking. AS a board, we have no authority to debunk anything, or to decide waht is worthy of debunking. What we have are individual posters and teh strengths (and weaknesses) of their individual arguments.
No one who firmly subscribes to a debunk-worthy idea is going to visit a forum that is explicitly for debunking stuff. For those whose minds are not made up, but who want to know more, we have GQ. Much of what goes on there is, in fact, debunking.
Furthermore, there is already a well known and mostly very good site devoted to debunking: Snopes.com. It does not make a good message board, just as the SDMB would not make a good Snopes.