QuotableSatoshi on Nostr: There's no need for reporting of "proof of double spending" like that. If the same ...

There's no need for reporting of "proof of double spending" like that. If the same chain contains both spends, then the block is invalid and rejected.
Same if a block didn't have enough proof-of-work. That block is invalid and rejected. There's no need to circulate a report about it. Every node could see that and reject it before relaying it.