Taking things off the net would be a huge step back for economy.

LLMs will cause a total collapse of trust online. This problem will be solved by a brand new online trust model (instead of the old one "has gained some followers by formulating text messages and forwarding gifs").

The trustees (bots/humans/orgs mixed) would probably need to sacrifice much more of their privacy. Not for the sake of orwellian Big Brother, but for re-establishing any trust whatsoever online.