Advanced permission system...
 

I remember I asked a similar question in vbulletin.org before, but received no response. I'm getting tired of the fact that sub-admins and mods can edit the posts made by the super admin. Is there an advanced permission system that prevents forum staff from abusing their power? I mean, mods are not supposed to edit posts by super mods, while super mods are not allowed to edit posts by admins.