Users shouldn’t be able to assign Piefed/Lemmy posts to a community
New posts should be in a general, catch-all section. OP could suggest a community/tag but it wouldn’t appear there right away. Other users can tag the post for a particular community or label it SPAM/Troll/Abuse.
If enough users tag a post for a community, it shows up in that community feed.
New users can’t tag until they reach a threshold of comments/posts that are positively received—not SPAM, has upvotes, replies.
This will enforce a level of moderation even when the community mods have ghosted.
There would be no cross-posting per se. Posts could be tagged for multiple communities but must reach a certain amount of tags for each community before it appears there.
all posts are just made in [email protected]
At one level, I absolutely HATE the duplication that splits comments.
At another level, I recognize that splitting comments is most of the point of community. Making all people comment on all posts essentially breaks the entire concept of developing a community-specific culture of rules and norms.
In theory you could have each community "adopt" posts, creating community-owned discussions against universal posts. That would be OK. Then instead of cross-post duplication you could look at a single post and see all of the communities that have adopted discussion on it.
Maybe that's the solution.
A tagging-based social media is an interesting idea, but for something as discussion-focused as Lemmy, I don't think it'd be a good fit as a primary algorithm/sorting system. Individual communities are just too different, and often serve different purposes. For example, while political memes and non-credible defense share a lot of content, one is a more serious and focused on governments and systems, the other is absurd and comedic and focused on militaries and their equipment. Their comment sections need/have entirely seperatre rules and shouldn't be mixed. That said, a more in-depth tagging system would be handy for searchability and browsing.