One of the reasons the various blog fora are valuable is because they moderate comments: which is to say, some are deleted/not posted. The obvious advantage is that this keeps out spam from the porno and online poker folk, rude and abusive nonsense, and the nutters. The obvious disadvantage is that none of the nutters think they are nutters and tend to whine about censorship. This is difficult: no-one is going to spend time and effort writing interesting comments if they think they will be blocked. But my spam/trolling/incivility threshold may be different to yours.
To use an example thats deliberately not the one you're thinking of, over at RC recently one John Dodds has been pushing his own wacky theories of GHE (or lack thereof...); see comments on this thread - 16, 18, etc. RC has probably been too gentle in handling him (nonetheless we (I) got bored in the end). The problem with that stuff is it disrupts the flow of sense.
James Annan suggests posting to sci.environment. If you have no proper newsfeed, go to groups.google.com and its fairly easy. Sci.env has the advantage (?) of being unmoderated, and of course it could aggregate stuff across many blogs, instead of the balkanised blogscape that exists. Why not try it? If your comments here are sufficiently valuable, post them there too, and watch them drown under a sea of junk. An interesting reverse experiment is being tried by mt, who has tried copying a posting from sci.env to his blog to try to have a more sensible debate there, but it doesn't seem to be working.