TIBA
As an Australian and as a professional airline pilot I'm apalled that TIBA is being used in Aussie airspace.
My job takes me into Southern Africa from time to time and until only a week ago we used TIBA procedures in Mauritius and Beira airspace. The requirement having been removed due to what is seen as improved airspace management. As previous correspondents have pointed out the fact that it exists in Africa is largely due to a lack of resources and if you have been to that part of the world you will no doubt understand.
Currently it also is used in Yangon airspace. No need to elaborate this point I'm sure.
Although it does work up to a point it requires a considerable amount of discipline and concentration to keep up with what is going on around you especially when it gets busy and/or there is a convergence of air routes.
To see it happening in any Australian airspace is nothing short of a disgrace.