This creates a huge problem when there are many of us entering collateral relatives with open profiles because they are deceased, and we have all the sourcing to do so (censuses, findagrave, SSDI, etc.). The immediate family of this person may want to keep the profile private even though all the pertinent information is already in the public domain. Do we then just have two profiles, one open and one private? Do we ask to merge the two and then try to remember why someone who died decades ago has a private profile?
When a death date is unknown, I agree that 100 is too "young" to presume death.