I'm curious to see what would happen in this case. Would DuckDuckGo or Bing get a boost that Google? Would Google struggle to recover that market share when it inevitably returned? Would public perception of Google take a dip, or would Australians respect someone standing up to the Rupert Murdoch press?
My guess is Australians would continue to use a non localised version of Google. Bing and by extension DDG is awful for Australian results in my experience.