I don't think they have county extension agents... I don't know if they even have counties in Australia.
Welcome to the Cellar, Bonifacio, Tawnyscrawnylions@ya & JLrep.
I think this is the act of an average, suburban living person, that knows bees (of any stripe) are insects, sting, and are a threat to happy BBQs. I doubt he/she knows much about the bee's, or any insect's, role in nature, only that they are a potential threat to his/her comfort.
I don't approve, but I understand.
A friend of mine got tired of being attacked by Yellow Jackets every time he mowed the lawn. He poured water down their hidey hole, but they kept buzzing. So he poured gasoline down their hidey hole, but they kept buzzing. So he lit it... yup, a 5 foot deep crater in the lawn. His wife yelled at him for that, but he didn't hear her... or much else, for a week.
If for some reason I decided to ambush a hidden nest, and subsequently discovered those combs, I'd sure as hell take pictures.