Here is an article that exposes the "end justifies the means" attitude of the IPCC and the other supporters of the catastrophic anthropogenic global warming hypothesis.

http://canadafreepress.com/index.php/article/7116

Steven Schneider is one of the lead authors of the IPCC Summary Reports for Politicians. The actual Technical Report that is released later does not agree with the Summary. The report states that the IPCC is 90% certain that temperature increase in the latter part of the 20th century was the result of man's activity. Yet, the IPCC did no work to determine how much natural effect their was, despite the obvious fact that in the past there were significant changes before man could have had an impact. Here is a paragraph from the Canada Free Press article:

Schneider, among others, created the appearance that the Summary was representative of the Science Report. However, he provides an early insight into the thinking when speaking about global warming to Discovery magazine (October 1989) he said scientists need, “to get some broader based support, to capture the public’s imagination…that, of course, entails getting loads of media coverage. So we have to offer up some scary scenarios, make simplified dramatic statements and make little mention of any doubts we may have…each of us has to decide what the right balance is between being effective, and being honest.”

Others may disagree, but Schneider's statement indicates to me that he believes that the end justifies the means. I think he is ethically challenged.