@dansup very interesting! awesome! something we should have had from day one, since we should have learned something from the email days, but it's here now at least. You say it'll work with pixelfed and mastodon, that's awesome! could it work similarly with go to social?
Now, imagine such a service, which doesn't only mark something as spam, but can be used to mark a message as different things, one of them would be spam, but also politics, racism, or even make lists of good stuff, doesn't have to be all negative, then users could decide what to do with something labeled, for example, politics. Crucially, this is on a per-user basis, and import/export can only be done between users, but you know, would be interesting to think about that kind of system too, now that this exists in a fediverse context.