ACMS and CAVOK92,
If you are happy that four people died because of a broken system and are content to just whinge on a bulletin board then that is your right.
BUT if you want to change the system then recognise what serious experts are telling you is true.
Get on to Worksafe, the Victorian Police, the AFP, your local MPs and point out that the Airservices organisation responsible for separating aircraft had the means to do so but did not; that the CASA OAR organisation charged with implementing international best practice in airspace administration has failed to do so.
If you simply criticise how the ATC did the job you will find he/she did exactly what they are paid to do - nothing will change.
A Ministerial question in Parliament is just a tiny annoyance to a public servant but imagine if a homicide detective or coronial investigator walks in to their office.......... that might get their attention!
Get AOPA or AFAP or any organisation you are a member of behind you.
And it would be really great if Civil Air (the ATC union) started telling their employer that change must happen to protect their members against possible criminal charges.