I did address the point. My conclusion is it cannot be done reliably by an automated system and that we have the choice of blocking manually or defederating.
Reddit did it fine.
So you want the insightful posts being hidden from a mag because someone else in the same mag spammed memes?
Mags should moderate themselves. Going back to the Reddit analogy, if a subreddit mixed memes and useful content, and I didn't want to see memes, I'd stop following that subreddit. That's why most informative subreddits usually banned memes. If I follow a meme subreddit though, I expect to see memes. I don't expect to see nothing just because someone else decided to defederate from every instance containing memes.
So you want the insightful posts being hidden from a mag because someone else in the same mag spammed memes? Because that's what you will get.
No, that wouldn't happen with my proposal.
Sorry but I don't want that.
Neither do I, but that's ironically what we'd both get if we followed your suggestion of defederating from "generic" instances. Most useful and informative communities I follow right now are on lemmy.ml and lemmy.world. If we defederate from them just because you don't want to click the block button a couple of times, we would both lose access to most informative communities in this space.
If, however, we simply filter some of the most active communities' content out, and enable users to keep blocking out stuff they don't want to see at all, you can get a good mix of all the content you follow, and you can still go directly to the communities in which you want to read every single thread and read every single thread. We could even have a /sub and a /filtered-sub, where in the first one you'd see aboslutely everything, and in the second one you'd have a Reddit style sub tab with a mix of content of the various communities you follow.
/all will soon become unusable anyway. It was great at the beginning, but the more people join and the more it will become unusable.
And that's fine IMO. /r/all was unusable on Reddit, too, and I think that's fine because it's not made for you or me. Some of my friends loved /r/all, though, and refused to use the sub only view. I think like on Reddit, /all is meant for people who want to see content from absolutely everything and like living in chaos, basically. I personally don't see the point of that, so I'd rather follow /sub. But I want /sub to have all of communities I follow, and not have most communities arbitrarily cut out because, again, you alone don't like memes.