I think FoxNews created the least sophisticated, but highly effective conspiracy theory, based on “the dog ate my homework”: https://www.foxnews.com/media/tucker-carlson-hunter-biden-documen etc ...
A. A “source” send them by mail, some damning documents.
B. They have no doubts these documents were genuine. And damning.
C. The package arrived empty.
D. They never made electronic copies. Because 2020, you know, FoxNews trusts mail-in 100%.
So in one single made-up story they manage to fuel a conspiracy about Biden’s alleged corruption, another about a deep-state at work, and between the lines one about the unreliability of mail-in voting!