Yes, the Aussie habit of abbreviating words must seem odd to outsiders, but what the hey? We could have worse traditions.
One well-known Australian tradition, discussed in the article, is for women to return home barefoot after a day of getting pissed at the races - pictured below. This can also apply to a night at the disco, or whatever.
But none of these qualifies as the most controversial of Australian traditions. When you go to the comment thread you find an unexpected outcome in that regard.
The most controversial of the traditions discussed is that of asking your friends or rellies (Australian for "relations") to "bring a plate" to a party or similar get-together. If you skim through the comments, this one causes real angst, or more like class warfare. Observe the fierce arguments for and against! Thus, "Tito" says:
Why invite someone over - when your guest has to bring their own food.
If you can't afford the party - then there isn't a party.
It's not the Depression - well not yet!
Ha! This person clearly just doesn't get it.
But I do like the wry observation from "Birdie":
I am now used to the idea of bring my own food to a party - otherwise there wont be much to eat.
I hope it's not really that bad in this person's life.