Granted the issue it largely depends on the author. If the author is doesn't name his files with unique names, he could just upload a bunch of them as untitled.zip
like these posts from the same author
**External links are only visible to Support Staff**...
**External links are only visible to Support Staff**...
Or 1.zip like
**External links are only visible to Support Staff**...
**External links are only visible to Support Staff**...
So when linkgrabber grabs **External links are only visible to Support Staff**... you get multiple files named 1.zip or B202211.zip downloading into the same folder as shown in this screenshot.
Regardless I think it is a bad idea to just lump everything into the same folder with no unique id to the filename. I think the old method of giving each post their own folder is best for organization, an alternative maybe to at least attach post id as a prefix?