For example, someone named John Brignell wrote:
James Hansen, notorious among global warming critics as a ruthless fudger of data. . .(as of 10/18/09 4:06 pm PDT). I asked him for proof that Hansen actually substituted bad numbers for real numbers, and his rather unconvincing reply was:
No, I did not mean that. It should not be difficult to find links to the critiques on the web via Google, but if you want somewhere to start you can try: http://www.numberwatch.co.uk/2008%20June.htm#twenty"
That is (he claims), Hansen made the horrible heresy of making a prediction that (he thinks) didn't come true, which makes him a "liar." Not just that he might have been wrong -- no, there has to be an evil attached to it, a maliciousness.
And, in fact, Hansen wasn't that far off, really, for a projection (not a prediction) that occurred 21 years ago -- a lifetime or two, in scientific terms.
10/20 CORRECTION: corrected the spelling of Brignell's name.