I know that I have looked at old family photos several times, but never bothered to label them because I knew who was in the pictures. If you don't have the time to scan in each individual picture to an online photo storage system, at least take the time to write the names in acid free ink on the backs of each picture so that those memories will not be lost forever.
When Cristina's grandmother Dorothy Findley died she found a whole drawer of wonderful old pictures of family, but not one of them was labeled and no one knew who they were. What a tragedy!