"Not doing anything illegal"????
What you may not realise is that a law was passed to make it illegal for unauthorised people to enter the public streets where this motley collection of corrupt war-criminals is conducting its wank-fest:
http://www.austlii.edu.au/au/legis/nsw/consol_act/ampa2007252/s19.html
"(1) A person must not, without special justification, enter a
restricted area or any part of a restricted area."
The term "special justification" is defined in s37.
http://www.austlii.edu.au/au/legis/nsw/consol_act/ampa2007252/s37.html
The best shot at a loophole for these "satirists" will be this one:
"(c) the person is required to be in (or pass through) the area for the
purposes of the person’s employment, occupation, profession, calling,
trade or business or for any other work-related purpose, "
....assuming the word "required" hasn't already been hijacked by lawmakers to exclude "entertainers seeking material for a show."