I've stumbled on them a couple times. I hadn't realized Evolution was a religion, and Darwin is hailed as a god, until I saw his Kool-Aid-drinking followers on one of those threads. They're creepy!
The Darwinists were the hip liberal set during the Scopes ("Monkey") Trial in the 1920s, hooting and jeering at the fundamentalist yokels. Today, they are the yokels, reciting their precious credo regardless of evidence. For example, in the Scopes Trial proceedings, to ridicule the 4,004 BC date of creation, they gave the age of the earth at 60 million years. THIS was "scientific." Today, the figure given is something like 15,000 million years, a figure 250 times as large as Darwinist gospel of the 1920s. The Darwinists are not the least embarrassed by this gigantic OOPS. The got the Biblical dating wrong, too, in attributing it to the Bishop of Ussher. In fact the date was given by one of the greatest scientists ever, Johannes Kepler, in Mysterium Cosmographicum (1596).
Another embarrassment the Darwinists would sooner leave in the closet is the close and conscious connection of Darwinism to the rise of the Nazis. It's a short step from "survival of the fittest" to calling yourself the fittest -- the master race. Nazi thinking followed the early Darwinist Ernst Haeckel, a personal friend and publicist of Darwin. Communists (and liberals and other collectivists and non-believers of many stripes) are Darwinists too, although not quite as flamboyantly as the Nazis.
Darwinism, being a naturalist religion, cannot account for good and evil. The Darwinists unknowingly pay the rest of us the enormous compliment of being fully human when they accuse us of evil. (It's always evil Christian businessmen who pollute, y'know.) It was Adam's Fall to know of good and evil. But those who do not know of good and evil are no children of Adam. They are not human at all.