That has got to be one of the most apropos links to xkcd I've ever seen. That said, if it were most any other forum, I wouldn't care so much, but I have found that HN is in general a quite intelligent community, and I hate to see that threatened by people so callously exploiting the natural skeptical streak you allude to. For instance, citing the Daily Mail is not actually respecting the debate, but going clear into denialist territory. I would be happy to see a real and substantive discussion of the faults of the IPCC, etc., but all I see is "AGW is wrong and the result of a conspiracy."