I see content warnings as another layer or service that’s different from spam. It’s more intensive as it needs to read media and not just text. I think it could benefit the network too.

It could sit in the 1984 kind spec as a new type (I don’t think flag with content-warning it exists today). I’m uninterested in any government like ‘Net Nanny’ approach.

One difficultly is if relays broadcast these events before any flagging services have reviewed them, you have a race condition where active users will likely see the content anyway - without having a lag. Users who connect later would be fine. It’s a trade off, slowly posting to broadcasting, or less augmented protection.