I suggested this a while back (sometime in May I believe) and realized I should change up some things... Anyway, the "Sproof" power allows Main Owners/Owners to edit what other users have said, once edited, it will not be saved into the events log. Also, it will say that the message has been edited on the main chat.
Example:
Can be changed to:
You must have the power to edit it, it is not a group power.