I really like this essay.
http://www.computercrowsnest.com/features/arc/2008/nz12191.php
It points out the spiral in science fiction, of how entertaining stories using dodgy science in the 1930s then created a genre with tropes that increasingly made no sense. But because they were initially allowed to stand as tropes, they became time-honored, to the point where much science fiction, once seen as real speculation on science and society, became ever more like magical fantasy.
I think it speaks volumes about how once tropes in a genre, or a subculture, become widespread and popular, they don't go away, regardless of outside stimuli.
My first original post in this blog (the first two were a welcome and reposting of a review I had previously written) was about this very issue. How transhumanists were picking fights with the UFO community, because the UFO ideas were badly out of date in regards to technology and biology (though as I note, I think the transhumanists are generally clueless when it comes to human behavior). Likewise, Cameron Mcormick suggests a similar problem with the cryptozoological focus on big "monsters," and the regular invocation of colonial "discoveries" in the early 20th century as models for the hunt in the early 21st century. Pamela McElwee voiced a similar concern over the label of "lost world" being applied to populated areas in Vietnam, in turn spurring interest in hunting mystery wild men. And I can tell you from personal experience that many ideas in alternative archaeology have roots in very old ideas long since discarded by those doing professional academic research.
I don't know when, but I want to develop this point more. But I think it is a crackerjack way of thinking about the development of ideas outside of the realm of falsifiability.