Climate change deniers Heartland Institute funded this lovely billboard in Chicago and took it down after one day. They say it was "always intended to be an experiment. And after just 24 hours the results are in: It got people's attention." From the press release announcing the billboard:

The billboard series features Ted Kaczynski, the infamous Unabomber; Charles Manson, a mass murderer; and Fidel Castro, a tyrant. Other global warming alarmists who may appear on future billboards include Osama bin Laden and James J. Lee (who took hostages inside the headquarters of the Discovery Channel in 2010).

These rogues and villains were chosen because they made public statements about how man-made global warming is a crisis and how mankind must take immediate and drastic actions to stop it.

Why did Heartland choose to feature these people on its billboards? Because what these murderers and madmen have said differs very little from what spokespersons for the United Nations, journalists for the "mainstream" media, and liberal politicians say about global warming… The point is that believing in global warming is not "mainstream," smart, or sophisticated. In fact, it is just the opposite of those things.