> "I know centralization is the anti thesis to federation, but when it comes to abuse and spam detection/mitigation, I think the fediverse needs an optional centralized and trusted service to share abuse/spam intelligence across instances so admins can better moderate their services"
I know of one guy who is working something like that: https://thebad.space/about . "Spam" here also includes instances who give power to people who are abusive and hateful. It is run by @Are0h