The moon hoax theories been around since the 70's. (The movie Capricorn One was partially inspired by them.) I've read somewhere it paralleled the cynicism of the post Watergate era.
If I heard anything about it at all in the 80's, it was from the Flat Earth Society, which apparently is still around in some form.
That pesky FOX special was like pulling the stake out of Dracula's skeleton.
If people aren't willing to learn a little history from reputable sources, there isn't much that will change their minds. The space program was covered pretty well in my elementary and high school years, even if the textbooks weren't always up to date.
There is something disquieting about people questioning history in the face of obvious facts though. There are far darker events of history people either through ignorance or malice insist are fiction, and that scares me.