Dangerous Faces

The sand scarps looking from St Kilda towards St Clair, you can see the two large sand stockpiles hugging the cliffs. one closeups with the offshore wind picking it up out to sea.
Included.. many children even under the supervision of their parents were scaling the cliffs and knocking more sand down, I even spoke [nicely] to a few and they just ignored my plea for respect and the danger their children were in and let them carry on ripping up and down the very unstable dune faces, especially some of the capping hard fill at the top which was very precariously angled ready to fall at any time.
I wonder why there is no monitoring of these actions, or notices to stay off the dune/cliff faces its clearly a danger to the public.. and how can the public be so disrespectful to their environment?