Hey kitecrazzzy,
I hardly think than a bunch of buoys at Melville are considered "invasive". I think that the Melville crew dealing with the local authorities have done a fantastic job in keeping access to the area for kiters. It's a great idea and if followed will significantly diminish the impact on the locals (residents) and will increase public safety.
I think without the measures taken, there would be no more kiting in that area. If you know the buoys are there and they are in a line 50m from the beach, and you crash into one that would most probably be your fault for not watching where you are going.
Congrats to the committee for organising a simple solution and retaining access to a great spot for many many kiters.

Big ups!
Good winds,