It will become even harder to find trustworthy content online. There will be lots more rabbit holes for people to fall into once it becomes commonplace to fake not just individual users but whole communities.

I really wonder what this will do to human culture as a whole, in the long term. So far we have relied on cultural artefacts and practices being mostly the work of other humans (directly or through tools). We are about to find out what happens when that is no longer the case.

Centuries ago, some people had the same concerns about the printing press. If "fools" fell for religious heresies then their souls could be damned to hell for all eternity, at least according to leading experts at the time.

Realistically it means Facebook style log in on all sites worth commenting on. The only way to prevent legions of bots, and the only way govs can keep enemy psyops at bay, will be online persona's tied to real life identitys.