Russia has done this by flooding the internet with content to act as AI training material. Drown out enough of the truth with your lies, and AI will never know the difference. Will other authoritarian regimes learn lessons, and decide to follow their lead?
If you can ban or capture enough internet infrastructure so you can suppress what you don't like, then you can use AI to help flood what you don't control with what you want people to think.
https://www.reddit.com/r/Futurology/comments/1k330in/a_sprawling_russian_disinformation_network_is/