I havnt seen the footage but was sickened to hear of such a disrespectful act from a group of very screwed up individuals. Unfortunately things like this happen worldwide but we only see a handful of these stories when the media sees fit to reveal them.
I think this is a bad reflection on Australia, kind of like some of the way crime documentaries makes America look really seedy , when in reality its only one side of the situation.
That pack mentality is common as it takes a fool to follow a fool.