Deepfakes were always one of the scariest parts of modern technology. "Freedom of the press is the privilege of those who own one", and all that follows from this.
I fear that the only durable solution is for the technological tower to collapse such that it is no longer possible to gather the amount of energy and rare metals required to run generative AI. Maybe it's a part of me that just wants the internet from the 2000s back, but I think there's a lot we could do for everyone's quality of life if the profit motive was no longer able to be applied to information technology.