Why do they not submit proof ? Because they don't have proof for a scam. Simple.
This thread reminds me of a long thread on a car site, where most of the people said the car was a fake, and it turned out real. Lots of analysis of the pictures, including people who were CERTAIN that it was a photoshop job, with detailed graphical markups of the (perceived) problems in the pictures.
Forget about the product photos. The company's office address is fake and their business is not registered with the state. The scammer clearly has some electrical engineering knowledge and probably has access to a lab somewhere. He's clearly qualified to mock up a plausible looking product. But he can't fake an office or an entry in the state business database. It has already been proven that Butterfly Labs Inc. is not a real business! The photos are irrelevant!
So, I suppose it would not be pluasable at all for someone to want to enter a product into an 'underground' economy and keep his business, well, underground? ;p
Edit; and why is it when anyone argues that there really isn't sufficent evidence to yell 'SCAM' that everyone assumes we're fuggin retarded and being scammed? Just wanted to point out that I am far from being naive. But, I am open minded....
http://en.wikipedia.org/wiki/Occam's_razor
Except in our case, the burden of proof lies nither with the nay sayers or the optimists. It is of the creator to present, and thus far he has, atleast in pretty pixel form....