The era of verifiability-- when photographic and video evidence could plausibly be trusted-- is over. Photos have been dubious since photoshop, but still required expertise and artistry to use. Fake moving pictures required considerably more extensive expertise, lots of time, and usually specialized equipment. None of that is true anymore. We are back to a pre-industrial age of discourse, where rumor and hearsay and…
I think the general hypothesis among mass communication studies doctorates is that as soon as a technology is created and adopted by a mass audience, there are immediate examples of humans immediately using it to manipulate public opinion in some way. For example, as soon as telegrams became a thing used to manipulate public opinion (like the Zimmerman telegram), fake telegrams became a thing. As soon as online video became a thing, fake online videos became a thing (like Lonleygirl15).
Isn't what you are really saying is, "humans like to create fake things, and then a lot of people fall for those fake things." Right? Why should we buckle up for that? Isn't it already a foregone conclusion?