Maybe https://www.shotcut.org/ (open source)? It's a while since I tried it ...

I thought Admins could ban (and purge) misbehaving single users from their site/instance instead of banning all users of an instance by defederating from it? https://join-lemmy.org/docs/en/users/04-moderation.html

PR #3249 got reviewed, approved and then merged by Nutomic and then reverted by dessalines because ...

@TKilFree This got wrongly merged without a PR from me. You'll need to re-open it.

Whatever that means ...

I thought a site ban, i. e. a beehaw.org admin bans a lemmy.world user, would prevent that user from posting on beehaw.org ever again without the lemmy.world admins needing to do anything.

Also, when you set Type to Subscribed in Settings the front page default feed only contains posts from communities you have actually subscribed to.

This does not prevent lemmy.world from accidently hosting illegal content, but it helps to protect your own feed from unwanted stuff.

You could try the fix that was proposed here:

https://github.com/LemmyNet/lemmy-ansible/issues/106#issuecomment-1606222766

This basically changes the way that nginx (nginx_internal.conf) switches between Backend and Frontend depending on the content type specified in the request.