I've just created a simple will for my FIL using WillMaker.
The application had 5 key documents to complete that are used as death nears. One of the docs was "Information for Caregivers and Spouses". The document had a series of questions on how you wanted you social media/blogs/other online 'friends' to be notified.
I had never thought of leaving those kinds of instructions before I saw that document but it made sense. 80-year old FIL kind of laughed when I was asking him about his online habits... all of his answers were NA.