Hi James, Im from Adelaide and frequently attend the Freedom marches and protests. These are happening Australia wide. Check out the attached website and keep up to date http://www.reignitedemocracyaustralia.com.au
There is an Adelaide contact but this blog wont allow us to cut and paste links so best if you email them on firstname.lastname@example.org and ask if you can be put on their email list. You can then be notified and choose to attend various rallies with like minded people.
Also you can go on Facebook and search for ‘Adelaide Freedom Rally’