I work with the New Family Search program which shares information with others and they can change and add to your pedigree. At first I was very perturbed (that word probably dates me), then I understood the dynamics of the process and how it actually related to real life and personal perceptions of a family. Now I actually am enjoying the working together and how it widens your knowledge.
I made the picture above to demonstrate how my perceptions of this family has grown as others have shared their information with me otherwise, I would have been stuck, as I really am on some of this family, seeing them as youth never grown up. I love finding out what happened to the members of the family. Where they went, if they had children and what life held for them. It is a wonderful adventure.