I think that the 'age-old children's "game" as you call it is no longer what it was.
Society, and that includes children, is far more sophisticated and advanced that it was a couple of generations ago, and that means that new rules governing acceptable behaviour have to be created to keep pace with the rapid changes in the way society operates, and how it sees acceptable behaviour.
So the notion that children 'showing each other' their respective differences one-on-one is clearly not comparable with the facility to share graphic images with the entire on-line world at the click of a button.
Markers need to be laid down, and the publicity of this case may well assist in bringing out one of the more sinister aspects of internet culture and children, and ensure that proper education on these issues is provided.