We should also expect large numbers of authorized AI endorsements. Imagine you're some actor and a foreign company wants to make a TV advert advertising yogurt and pay you $1000. Might as well say yes - as long as they use AI, you don't even need to lift a finger. In fact, you can authorize thousands of ads across the world and pull in a nice million dollars, while becoming 'the advert guy', all without doing any actual work.
re: this film -- https://en.wikipedia.org/wiki/The_Congress_(2013_film)
Yes, I know. There are enormous upsides to anonymity. But at the same time, so much harm would vanish, if every word written, and every deed done, was indelibly linked to the entity responsible.
I think, sadly, this is where all this will end up.
Honestly, I can't think of very many problems that would be solved by removing anonymity. There are a few, mostly related to to reducing actual criminal activity, but not enough to compensate for what we'd lose.
And hate speech/fraud/scams could be punished.