They likely knew why you asked. I suspect that many of them are trolls, but there are some that are so concerned with the economy that they want to believe it is not true.
This may also be a rerun of the the SBVT, more complicated and striking more. The RW media is spending entire shows on how there is no AGW. They also are smearing Gore, saying he is in it to make money, and they are claiming that they care about the poor, the homeless etc whose lives will be made tougher by cap and trade. Now, they are completely creating a made up vision of all the scientists working together to create a hoax. Daily Kos has an excellent diary with tons of information shooting this done.
http://www.dailykos.com/story/2009/11/25/808088/-The-SwiftHack-(ClimateGate)-Scandal:-What-You-Need-to-Know
To complicate it, there are the too cool left, led by Matt Taibbi, who have connected dots (even the ones not yet there!) to say that cap and trade is another Goldman Sacks. Here, I do think that every safeguard imaginable must be used to prevent speculation, but it is crazy to declare things like this before the process is even designed.