Good idea. You could also add some quick titles that would allow your moderators to close and mark the topics "CLOSED BY -whoever-". I use this sometimes on my board and it works.
Also it needs to edit php code to prevent trashing/moving/mergering/splitting and set the edit level to admins, so his employees will not modify the users posts.
You can add a "Assisted by %mod% - " quick title.
Note ONLY one quick title can be active at a time.