You could create a board for this yourself, just disallow reading permissions for the normal usergroups. You would probably need to set all moderators as moderator of this board as well. After that you can tell all moderators to move threads to this board instead of deleting them. This allows other moderators and admins to see the posts afterwards as well as having the possibility to move them back to the public forums.
Of course, moderators can still delete posts if they are malicious.
I do believe there are plans for letting the admin set which actions moderators are allowed to do in some future version. It would be quite welcome I think.
/Gardener
www.rollspel.nu
