A friend's ex-husband is dying of cancer. I didn't know him at all, but I feel very sad for her and her children.
I remember 9 years ago a friend who was already spending his evenings in chat rooms came into work, shaken that a young teenager he knew on a board (literary I think, not strange) had died and someone else on the board mentioned it. He said he didn't know how to describe his sorrow. Virtual grief?