It has been a while since I have written about the FamilySearch.org Family Tree Private Space. Users of the Family Tree are justly concerned about their "privacy." But it also important to know that dead people do not have privacy rights that can be violated by anything in the Family Tree. There is a confidential setting for a very few dead people usually due to a confidential data issue. Each living person in the Family Tree has a private space. Basic information about Private Spaces comes from a Help Center article entitled, "Understanding Private Spaces."
For example, let's suppose that a person has a large family including grandchildren and great-grandchildren if any of those descendants; children, grandchildren, great-grandchildren etc., enter the person, assuming the person has his or her own name in the Family Tree, then each additional entry creates a duplicate. When the person dies, each of those duplicates will have to be merged into a final, single copy of the deceased person. Since this also applies to any person for whom there is no death information, care should be taken to mark people correctly as deceased.
It is also not a good idea to guess about whether a person is living or dead. The simplest solution for this issue is to apply the 110-year rule. Assume all people born within the last 110 years to be alive unless you have specific death information.
Family Search has talked about modifying the Personal Space to create family spaces, where members of the same family could share information, but the concept is not yet beginning to be codified.