From The Daily Beast:
...If argument is futile, then getting on-stage with Creationist is not a "debate" in any sense of the word.
Once criticized by campaigners for his reticence to address contentious issues, Attenborough is no longer willing to speak in hushed tones.
Sitting opposite the kangaroo enclosure at London Zoo, he told The Daily Beast he had lost patience with the “ignorance” of creationists, polluters, and climate change deniers. “To simply say that you must accept unquestioningly what you learned at your mother’s knee is not the act of an intelligent person,” he said.
In fact, Attenborough says he has finally grown sick of America’s attitude to climate change. “I think it’s very sad that people won’t accept evidence for what it says—it’s extraordinary that one of the wealthiest, materially advanced societies in the world can support irrational myths in that way,” he said. “That they should do it privately is up to them but since what they do effects that whole world it’s pretty serious that they should not accept that humanity has been responsible for these changes that are absolutely evident to everyone else.” ...
He does also have sympathy for those who resist the prevailing science on climate change. “There are very good reasons why people should not wish to accept it, because it interferes with their business,” he said. “I would much prefer it wasn’t true—but it is true and unless we can do something about it we are going to be in trouble.”
He has less time for those who deny the existence of evolution, however...
“If somebody says to me I believe every word of the Bible is true, you can’t argue against that degree of irrationality…there is actually a way of looking at the natural world and seeing the evidence and it’s all there. And what’s more it’s the same evidence whether it’s in Australia or Northern Europe or wherever. It’s all the same—it all produces the same answer and you can all see the evidence—if you reject that then there’s nothing I can say.”
It's spectacle, where Science gets to make the reality-based community feel good by mounting elegant, logical, evidence-based proofs...which the Creationists get to play troll and dance around poking Science with a pointy stick, and the idea that you are going to sway someone using the tools of science -- facts, reason, provability, and an openness to being wrong -- to a group whose entire movement is predicated on rejecting every one of those tools is ludicrous on its face.
It's a public entertainment where each side gets to walk away thinking their guys dazzled like the Harlem Globetrotters and the other clowns got their plodding perennial-loser Washington Generals' asses kicked.
By all means, don't ignore them. Never miss a chance to ridicule the ridiculous, but never pretend they're going to go away and that the upside of "engaging" them in any way outweighs the downside.
Centuries ago, an astronomer like Kepler was able to gently promote the de facto heresy of heliocentrism while avoiding the worst of Galileo's fate by demonstrating the commercial value of his work (calendars, navigational charts, horoscopes, etc) to the monied interest of his day, while at the same time couching the results of his heresy in the most pious and God-fearing language.
Today, there is no monies interests dedicated to saving the planet from catastrophic climate change that are anywhere near as powerful and well-funded as the mercantile interests that bankroll ignorance and denialism.
The only thing that will change that equation is driving them from political power and forcing them to change.
To pretend otherwise is just another exercise in faith-based folly.