Who can honestly say they’ve never contemplated murder? What red-blooded Australian can put their hand on their heart and swear they’ve never lain awake at night imagining a world without a certain bullying boss, or infuriating colleague, or interfering neighbour, or unattractive spouse? And who has not mitigated the boredom of a dull meeting or long train journey by wondering how that world might be brought about? Very few of us, of course, are inclined to take it any further.