If this was ever to be implemented, it should ONLY be for lmods.
That way it would be fairly simple to make this a reality. It would also be a useful tool for OFFICIAL* clan/org moderators. And while we're at it, upgrade it from only threads, but to entire boards(with the option of single board moderation)
*Why official? Well because they already have set moderators, and for the mos part they know wht they're doing. Outside of lmods, the standard person should not get this. vBulletin is simply not made in a way that would even allow this to be a reality for non-lmods, well, without a LOT of hacking of its code.