The Eureka flag has a long history of being appropriated by anyone standing up to authority so it does at least make sense.

The red ensign is interesting, the article points out it was historically the civilian flag but to me it is the flag of the merchant fleet. This means that a flag that has been most used historically to signify obedience to and protection by Australian law despite not being in Australia has been appropriated by a sovereign citizens claiming that they don’t need to follow Australian law despite being in Australia.

:/