This is kind of fun. Intel and (apparently) UC Berkeley have created a Firefox extension called Dispute Finder that identifies and allows users to identify disputed claims on websites. It's relatively new with only 8,000 downloads of the latest pre-release version.
So I downloaded it, signed on, and pulled up Bob Carter's useless "warming stopped in 1998" claim at the Telegraph. Users of the extension now see the claim is disputed, which somehow makes me feel better. I then tried the search function to mark dozens of sites parroting the claim, but that didn't work. Oh well.
I suspect the feature might be more useful for non-obvious disputes, but it still feels good to get it out there.