I like to give people the benefit of the doubt, but sometimes they squander it. A couple of examples.
A few months ago, I gave a bit of a mixed review to Why Beautiful People Have More Daughters, a book about evolutionary psychology. It turns out that the main author, Satoshi Kanazawa, has taken his ideas to at least one ridiculous and terrifying extreme:
Imagine that, on September 11, 2001, when the Twin Towers came down, the President of the United States was not George W. Bush, but Ann Coulter. What would have happened then? On September 12, President Coulter would have ordered the US military forces to drop 35 nuclear bombs throughout the Middle East, killing all of our actual and potential enemy combatants, and their wives and children. On September 13, the war would have been over and won, without a single American life lost.
Yes, we need a woman in the White House, but not the one who’s running.
That's straight-on crazy talk (not to mention almost certainly incorrect in its results). Doesn't raise my opinion of his book, that's for sure.
On the other side of the evolutionary aisle are the producers of Expelled, a documentary claiming that the academic and scientific establishment are unfairly quashing free speech, by shunning researchers who promote intelligent design/creationism and other "critiques" of evolutionary biology. The movie is hosted by Ben Stein (probably best known as the teacher who said, "Bueller? Bueller?"), and also apparently argues that accepting evolution leads inevitably to atheism, which then (get this) led to the Stalinist pogroms and the Holocaust.
Among those interviewed in the film is PZ Myers, an American biology professor. He is also almost as well-known an atheist and staunch critic of religion and creationism as Richard Dawkins. He says that the producers were dishonest when asking him to appear in Expelled, claiming that its working title was Crossroads (although the expelledthemovie.com domain had apparently already been registered) and that it was a more objective examination of science and religion, rather than a project advocating for creationism. He has been scathingly critical of the film ever since.
Myers's interview ended up in the film anyway, which has been pre-screened a few times in the U.S. for largely hand-picked evangelical Christian audiences. One of those screenings just occurred in Minnesota, where Myers happened to be, so he signed up on the website for tickets for him, his family, and some friends. But when he showed up, the film's producer, who was also present and helped to organize the screening, barred him from entering.
His family and friends got in. One of those friends, also someone interviewed for the film under false pretenses?
It's not turning into a good PR move for the movie's producers.