When someone on Facebook dies, their page often becomes a Memorial Wall. A place where friends and family can forever eulogize about their relationship and pay their respects.
The only creepy thing is that Facebook doesn't know the person is dead. So every year, you get a birthday reminder from a dead person. And that can be troubling.
Not as troubling as if a family member decided to post from that profile AS the deceased person, even with the best of intentions. (Fortunately I have yet to personally experience this).
But, it raises the question. Would you ever un-friend a dead person? Why or why not?