Unfortunately a member has erased his posts. The result is diminished value of the discussion(s) effected. The result is a diminished value of the board content. It is generally accepted that content posted on a discussion board is the property of that board and that board should act now to protect itself from future theft of it's content and value.
Limit the user edit feature to 1 hour, 1 day, 1 week... what ever you feel is appropriate. Obviously if the OP found the information was incorrect and needed changing an administrator could assist in such useful corrections. But what happened just now could be avoided, no ... prevented in the future. GL and GD
In the meantime you want to limit this person's access to the board before more community content is removed.
Limit the user edit feature to 1 hour, 1 day, 1 week... what ever you feel is appropriate. Obviously if the OP found the information was incorrect and needed changing an administrator could assist in such useful corrections. But what happened just now could be avoided, no ... prevented in the future. GL and GD
In the meantime you want to limit this person's access to the board before more community content is removed.