I'll openly admit that I did not participate in this years' debacle and have not done so for the previous 3 either. In that time, I've moved states, gotten married, raised 2 kids, completed my tax each year and got refunds back from the ATO, voted umpteen times at all 3 levels of government, applied for a passport and even traveled to the US (okay, I did get a SSSS on my boarding pass leaving but that's probably just the US being paranoid...) without any drama at all and without any surprise letters from the ABS.
Methinks its all much ado about nothing...
(and the ABS openly admits they only target a 98% success rate which means that they're okay with over 180K households not doing it either each time)