Have you ever spoken to a French person while imitating their accent and found that they understand you much better?
I was really worried that people would think I was making fun of them, but, in reality, they just thought that my horrible American accent had gotten a little bit better. :)
Also, given how poorly aussie accent is portrayed in so many TV shows and movies - even by australian actors because "they have to" - we might be used to it and see your effort as pretty minimal.
I'd give you a pen anyday. Have a good one!