Can they? It doesnt seem so simple because they have no way of knowing which posts are edited in good faith vs not.
They can try to undo comments which sre repeated 10x+ times or something I guess, but editing users comments seems like a really bad move
I’ve been thinking about this.
I am thinking essentially the solution is the equivalent of multi reddits. In the UI, either from the user perspective, or the server admin perspective, you can setup communities that are just aggregations of different communities.
Then a user can choose to browse /c/cats which is actually just /c/cats from lemmy.world, lemmy.ml, etc as one feed.