Those lovely people over at the Heartland Institute have been forced to pull a billboard ad after claiming that Charles Manson, Fidel Castro and Ted Kaczynski are behind current climate change theory.
"I still believe in Global Warming. Do you?" reads the ad, next to a picture of Unabomber Kaczynski. It went live on Thursday afternoon on an electronic billboard on the Eisenhower Expressway near Chicago, where the Heartland Institute is based.
However, within hours, an outpouring of opposition - much of it from Heartland's own supporters - led the organization to pull the ad. And it's now claiming that it meant to all along.
"This provocative billboard was always intended to be an experiment," says Heartland’s president, Joseph Bast. "And after just 24 hours the results are in: it got people’s attention."
The Heartland Institute is known for its entertaining output. In February, the group threatened to sue any person daring to comment on certain leaked internal documents - even where the documents were genuine.
And, despite pulling the ad, it's still standing firm on its claims that climate change theory has been dreamed up by a bunch of killers.
"The most prominent advocates of global warming aren’t scientists," says Bast.
"They are Charles Manson, a mass murderer; Fidel Castro, a tyrant; and Ted Kaczynski, the Unabomber. Global warming alarmists include Osama bin Laden and James J Lee [who took hostages inside the headquarters of the Discovery Channel in 2010]."
It's a great argument, but one which they surely aren't taking nearly far enough. I have it on good authority that bin Laden, for example, also believed that two plus two equals four. How, in that case, could any right-minded person possibly think the same?