Lemmy instances can enable an option to prevent non-admins from creating communities, so if it isn’t available on your instance (usually in the header area on the website) then your instance admins have disabled that option
grant
A possible solution to moderation is allowing communities to delete a parent comment (+ the child comments) from that community w/o actually fully deleting the comment
Therefore if you view that specific post with the context of a specific community, you only see the comments that are not deleted, which have (most likely) been moderated already
If you view the source post directly, you would see all the comments for that post
With the feature request I posted on GitHub, it would work similarly to reposting/reblogging on Mastodon.
Except inside Lemmy anyone who can post in the community would (most likely) create a post linking to an existing post and it would appear that the post mentioned just got posted into that community
Moderators would ideally see who created that crosspost and have the ability to block that person from crossposting (or posting entirely) to that community w/o affecting the third-party post
If someone wouldn't want their posts crossposted they can just block the community's actor (account)
It would also allow for Lemmy users to crosspost posts from other Fediverse services, such as Mastodon
Eg you see a post on Mastodon that would fit great in a startrek community, you would be able to cross post that Mastodon post into that community
This would enable individual posts to gain traction and comments without having comments/replies being spread across multiple places
Edit: it would work very similarly to reposting/reblogging on mastodon
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It was really easy to update as well this time around