well, it will be very useful for the people who lost their memory due to several reasons, obligations and difficulties without their involvement. those data should be important to the one who suffers.
so try to add a feature to access the data which is lost in surfce but is available for recovery till date, if any way to be used to recover, it is ok.
but just to make sure provide feedback and conformation similar to permissions access by the user to access the whole data, in one-time use, anytime or not to be used.