Thinking about a noteguard filter that broadcasts nostr notes of the IP address of bots that spam my relay. Then other public relays could read that note and add it to their block list automatically (...
What if you did a combination of a block List and allow List? so the users can subscribe to your list by default in your platform but then they could submit a set of users or IP to their personal allow list on their client and it permits these to come through or you could reference their followers if they’re following somebody you’ve blocked, you could allow that to come through. If there’s inappropriate person responsible because they specifically added it to their list.