Part of me likes the initiative, but I fear that there are way too many different claims on that site to ever be fully debunked.
That's the problem with so many rumours being spread on the internet. They may all be false, but dare I say: You will never debunk all of them.
Btw, can we get some of these pizza investigators to start investigating this whole fraud claim against Jeff Berwick (The Dollar Vigilante) instead? Maybe put out a similar bounty?