There will be a web of trust, with a valuation of nodes by trustworthyness. And people will get only one id for this. Ones name is ones value and a reputation will be a hard earned thing again.
There is a small sub-plot about how he had to give a fake persona credibility on the untrusted network in order to be able to leverage a creating a fake account on the trusted network.
Explained: <https://www.explainxkcd.com/wiki/index.php/635:_Locke_and_De...>
Reality has largely demonstrated that far more thoughtless propaganda of the Big Lie, Firehose of Bullshit (or Falsehood), associated with Russia, floods of irrelevance which tend to bury more significant stories, favoured by China, and outrage / hot-button topics, which are common in US-centric media, though a timeless technique.
Memes and simple messages attract attention and spread. Complex narratives and analyses ... not so much.
But yes, voices that deserve no attention whatsover have dominated the media landscape of the past decade or so. Not that this is entirely novel.
But yeah, maybe the idea that you can even 1% trust random content on the Internet without having a source doesn't really make sense if you think about it IMHO. Either you do this web of trust, coming from a well know real world source, or be Wikipedia-like with linked reliable sources for the viewer to check.
By the way, wasn't this how Google ranked pages back in the day? Ranking pages that get linked to higher? And even before that there were P2P web rings.