I found this on the inside door of a cubicle of the public toilets at the Cann River free camp caravan park.

(37.567088 149.146288)

Author Unknown.

If you are having trouble reading it here is Google Glass Conversation to text.

“A Big Mac; the communion wafer of consumerism. not really food, but the promise of food. Whatever it tastes like, whatever it's made of, Once it touches the lips A Big Mac is trans-Substantiated into the mythological Hamburger. A Big Mac is not big. It doesn't taste of much. It isn't good for you. And, it seems sweet. why does it seem sweet is, as the company says, it isn't laced with Sugar? Because the Big Mac is based on illusion, as with the philosophy of Public Relations, it tends to elliminate choice. this is an important characteristic of contemporary Capitalism. The Big Mac is a symbol of Passive Conformity.”

Some of the words of the Simon & Garfunkel song the sounds of silence say: And the sign said, “The words of the prophets Are written on the subway walls And tenement halls And whispered in the sounds of silence”

We'll apparently in Australia they are written on the inside of toilet doors.