I think someone said it best, if you can't trust your staff, they shouldn't be staff...
A great example is something that happened on my forums.. i trusted this kid to monitor our Gaming section on our site, which was our largest and most popular section. One day he decided he didn't want to hang around anymore, so he deleted every single post that had ever been made by anyone in that section, and then left...
All in all, if you don't trust them to not fiddle with your forum settings, keep in mind what they do have access to fiddle with, then think, do you really trust them enough to give them THAT much access to your site?
