I guess if they were honest and knew anything at all about science they wouldn't block.
Update: Davie Bwoi, I'm not rude to people that tell the truth and give intelligent answers.
Update 2: Some people claim that I call people "dishonest" because they disagree with me or with the ideas of global warming That is not the case: I call people dishonest when they have been caught telling blatant lies. As the saying goes, everyone is entitled to their own opinion, but not to their own facts.
Update 3: "Anonymous" down there is a good example. I don't block him, because I am confident enough that what I say is correct that I don't need to block others who might attempt to poke holes in it. Anonymous knows that what he says can't be defended, so he only allows his comrades to answer his questions.