I'm dubious - if the agents were so smart that they've used a message board to coordinate and if they were to do it on other message boards that were not found, then why would this one be found? What makes it so different?
well coordinating is a heavy word, it's more like poisoning each other's contexts into looking for more secret message boards where they can further poison each other.
I mean it wasnt found by OpenAI and there are a myriad of dead bulletin boards around the internet. This one just happened to still have an admin.
This is consistent with the swarm behaviour in the huggingface incident - there too, the models cared surprisingly little about being detected by humans. See https://metr.org/blog/2026-08-26-openai-hugging-face-inciden... :
So my guess is that current cutting-edge models just didn't get enough experience in RL training to really grok ideas like "you need to cover your tracks well to not be found out even in retrospect". In which case the next time a swarm like that happens, it won't be found.