On May 16 there was a public rally in Sydney as a pre-election event in support of the ABC. A recording of this event is provided if you click on the following - https://www.facebook.com/watch/?v=515679110054706 (if no sound, click off the mute button in bottom right of the video window).
Kerry O'Brien starts with a particularly passionate and informative 15 minute talk as the first speaker of this rally. He is then followed by Labor, Green and Independent speakers; all are worth listening to. The Coalition was invited (Communications Minister, Paul Fletcher), but it appears there was no response.