"Bitcoin mining will destroy the environment!"
"Bitcoin will create a deflationary spiral that causes consumption to crash!"
The latter cancels out the former. Checkmate, FUDsters!
I would add that Bitcoin Mining might also end up inspiring an international race for global innovation towards the most efficient power sources.
Much like it took global competition for the space race to the moon, #Bitcoin could inspire countries to compete for low power costs
I think it's still healthy that there is constant questioning of deflationary currencies. I wouldn't necessarily consider it FUD so much as healthy skepticism