The Marree Man is nothing more than the equivalent of a crop circle on Aboriginal Lands.
The attitude of the originators of these works is identical - produce a supposedly-awe-inspiring etching visible from the air, and create a huge mystery over the origin of the work.
However, their efforts basically involve the defacing and destruction of other peoples property and flora or crops, without any reference to, or approval from, the land/crop owners.
There's nothing clever or smart or ingenious about it - unlike the ancient civilisation etchings visible from the air.
In todays world of GPS-guided machines, and a myriad of powered mechanical devices, anyone can carry out these works with little effort.
It's essentially graffiti on a large scale, and it has little redeeming value, either in artistic merit, or value to the landowners. There must be a multitude of other methods that help the Aboriginals to become more self-sufficient, and to assist the aviation fraternity and industry, rather than brightening up some unwanted large-scale graffiti.