I thought the Australian Communications and Media Authority regulations did not permit the unauthorised interception of radio calls, but I've not been able to find it in any legislation. If it were so, AVDATA's data harvesting could be stopped dead.
Nice thought, but no cigar.
Very few radio communications have restrictions imposed on being monitored. One is telephone calls and associated communications, covered by a telecommunications act or acts I believe.
Radio communications can be legally listened to, including police, fire, ambos, military etc. etc. Some such services are encrypted these days anyway. Then of course there are ADS-B receivers -
There are thousands of radio scanners out there - many sold by DICK SMITH ELECTRONICS
- plus online streaming.