Oh, I don't disagree. That said, some of them stand up to time better than others, in as much as they can contain genuinely novel ideas, by the standard of most modern people.

Other books and authors are just infuriating - the memes they set running weren't necessarily a great thing the first time around, and did a lot of damage to collective human reason. Eliphas Levi immediately springs to mind; there are plenty of others. "Illuminatus!" probably falls into this category, but I don't think that was R.A. Wilson's fault.