I recently acquired another Xenforo forum and had @audentio merge it with my current forum.
After which I installed an addon (NixFifty: Move to Trash Can 1.0.5a) to help my moderators manage the day to day deletion of threads that were not relevant to our forum.
The Trash Can idea wasn't working as well as I thought so I disabled it.
However I realized after doing so that the Move (post or thread), Edit thread, etc. ability are completely gone. I have double and triple checked the permission settings and nothing has changed, and still "allows" moderators, admins and myself to manage threads by anyone.