If you stop the regular people from using AI then only criminals and government will use it. How is that better? And you can't stop it because a good enough AI will run on edge/cheap hardware.

To be practical about disinformation it would be better to work on human+AI solutions. Like a network of journalists flagging stories and then AI extending that information to the rest of the media.

You should see the problem of disinformation as biology, the constant war between organism and viruses, the evolving immune system. Constant war is normal state, we should have the AI tools to bear the disinformation attack. Virus and anti-virus.