Well-Prepared or Morbid?

What do you think about obituaries prepared in advance? Reporters recently revealed that AP has a prepared obit for Britney Spears, speaking to the darkness she's recently been through. But the vast majority of obits in the can are for people in their 70s or older.
What does it say when we prepare text in advance of the death of a woman in her 20s? Should an obit merely cover a career or should it speak to the larger context of a person's life? Should it speak to her troubles or is that trampling a person's grave?