The problem as a whole isn't new, but it's ramped up to a new level and applied more broadly. If your estate doesn't have provisions for handling your Facebook account in it, it will get left up on the Interwebs. And some of the distant friends who forget because of old age or were so distant they never really knew the person past away will continue to write happy birthday wishes, year after year. Those wishes will end up being seen by people directly affected by the death, year after year. It's not a desirable experience. I think the big challenge here is at the intersection of how we'd like the privacy of data to change on passing for data that was previously semi-public or widely shared which is new (In some sense the data is out there and can't be changed but platforms often govern how we experience the interactions around it). The problem you describe is kind of the opposite -- how does confidential data stay confidential. The other direction is sort of new, and isn't as much a data/information problem as an interaction one.