(I have an Aussie wife, excellent Kiwi/Aussie banter in our house :)
God, if only we had 2 more Gold medals.
Both my kids were born in Australia, and my youngest (she's 11) considers herself to be fiercely Australian, despite being 3 when we moved back home. She even has a Wallabies cap that my wife bought for her behind my back :-)
Yeah the odd one can go feral. Two of ours currently live there.