Reg Fallon, 88, founded anti-drugs lobby Concerned Citizens of Griffith following Mackay’s disappearance.

Mr Fallon said it was “unfair” to kill the Bali nine ringleaders for their crimes because they have already served time in prison.

Chan and Sukumaran were arrested along with the other members in 2005. 

"I'm totally against drugs, especially heroin,” Mr Fallon said.

"I'd be in favour of killing them, but they should have done it right away ... they've waited too long.

"They've been in jail 10 years and it's a bit unfair to be knocking them off now."

Chan and Sukumaran, who are waiting to die on Nusakambangan island, will be given 72 hours' notice of their death.

Indonesian Attorney-General H.M. Prasetyo confirmed the prisoners would each face a firing squad of 12 executioners.

A commando will also be present to shoot the men in the head if they are not dead after 10 minutes.

Member for Riverina Michael McCormack said the looming executions were “chilling".

Mr McCormack asked those who were critical of Chan and Sukumaran to “pause” and sympathise with the “terrible situation” the family finds itself in.

“They should just stop and pause for a moment and say ‘imagine if it was your son, imagine if it was your daughter’,” he said.

“There’s no winners in this situation. They are going to, by the looks of it, pay the ultimate price."

Mr McCormack said people were capable of turning their lives around from the “scourge of drugs”.

He said he was moved by Deputy Opposition Leader Tanya Plibersek’s powerful speech to parliament about her husband, Michael Coutts-Trotter, who has a historical drug conviction.

Mr Coutts-Trotter is the former director-general of the NSW education department.

A Tumut girl who wrote a letter to the Indonesian President said she was “annoyed” Australia’s message of reform had fallen flat.

Jessica Larder, 12, again pleaded to Indonesian President Joko Widodo for a stay of execution.

“I feel annoyed they aren’t taking into account what they are trying to do for the other prisoners,” she said.

“If they kill them it will be a total waste.

“They shouldn’t have to die.”

Mr McCormack said the plight of the prisoners was a “grim reminder” to Australians about the implications of drug trafficking in foreign countries.

He added that Indonesia was a sovereign country with its own legal system. 

“It is a very grim reminder, particularly to young people, that if you are caught overseas you will face the consequences,” he said.

“You could face the death penalty.”