Sure, but it was still possible as there were communication formats that have been useful such as audio and video recordings good enough for evidence in court.

Sure, but it was still possible as there were communication formats that have been useful such as audio and video recordings good enough for evidence in court. That is about to be lost. Soon the fakes will not be distinguishable from reality. They are good enough already to fool enough people to be disruptive. This becomes an order of magnitude worse than what we had before.