It was people deleting their own posts that used to cause as many of the so called “broken” threads as did moderators moving posts, on the old forums, as the post would generate an ebot the moment it was posted. The delete function does completely remove a post with no ability to restore it. and no evidevce of the post to expalin what has happened to cause the “no posts exist” that happened so frequently.
I am not certain if the inability for users to delete their own posts on this forum is designed to stop that, or if it is just a limitation of the software, but it does stop this happening.