all4u speaking as someone who has lost a child, a girl almost the same age as Milly, I can tell you that this issue is NOT trivial.
To have strangers rummage around in your child's phone, to have them search for dirt on your child, for the media to defile your child in this way.
It is beyond words.
Nothing is trivial when you lose a child. Your memories are all you have. They DELETED messages. Messages where people would have spoken her name out loud.
Not trivial.