In my experience, ringing the AEC and saying "I thought I might have flu, and thought it best to avoid crowds" is enough to save AUD$50.

A huge difference between here in Oz and there in the USA _as I see it_ is that we are conditioned to vote, whilst you are conditioned to vote if you care enough. The fine here is just enough to be annoying, and given the streamlined process at most polling places (you still get queues) it's usually much less hassle to go to the local polling place (town hall or primary school usually) for half an hour. Given the existence of early polling and postal votes there's really not much excuse for _not_ voting unless you're religiously opposed - although I have avoided fines by calling ill-health.