I've written a bit about a project I've been working on for a while: peer-observer: A tool and infrastructure for monitoring the Bitcoin P2P network for attacks and anomalies
I have too many other projects currently, but I think this could be a fun side-project for someone: Can we spot public spy-Electrum servers run by Chainanalysis?
I've persistent my notes on the May 2023 Bitcoin Core node DoS problems. These are background information for the disclosure from last year. When non-ideal sorting, mass BRC-20 mints, and spy nodes caused a CPU Denial-of-Service on the Bitcoin network: