Not trying to be argumentative but to complicate that discussion a bit -- one person's "disinformation" is another's "truth (social)"...

Just like asking "what is bitcoin's solution to money laundering?", asking what Nostr is doing about "misinformation" is sort of missing the point. Nostr, like Bitcoin, is a protocol, not a company, not a product.

It's your obligation as an information consumer in the 21st century to apply critical thinking and reasoning.