John Tyson suffered an unthinkable tragedy in the Queensland floods in 2011.
The Gold Coast man lost his partner and son when they were swept off the roof of their car before volunteer rescuers could reach them.
He knew nothing could bring Donna and 13-year-old Jordan Rice back – but he wanted the teenager, who instructed rescuers to take his younger brother Blake first, to be recognised for his bravery.
Tony Abbott, who was then opposition leader, said Jordan should get the highest civilian award for bravery, the Cross of Valour.
But three years have passed and nothing has happened.
Two weeks ago, Mr Tyson took to his keyboard, launching a petition on Change.org asking for the Prime Minister to formally recognise his late son's heroic act in helping to save his 10-year-old brother.
He describes how his son's last words were "take my brother first".
"Jordan couldn't swim. He must have been petrified. But he put his fears aside to make sure his brother made it through the terrifying flood," the tribute reads.
More than 80,000 people have signed the petition, making it one of the site's best-supported causes.
Mr Tyson is one of 2 million Australians who have used the online platform since it launched in 2011. Australia is the second-highest per capita user of the site in the world.
Change.org Australian director Karen Skinner said the high number of users, which includes both people who start and sign petitions, busts the myth that Australians are disengaged from public issues.
Research undertaken by the organisation shows the top three issues appearing on the site concern health, education and the environment.
However it's the individual campaigns, with an emotional story attached, that often attract the most signatories.
Ralph Kelly's campaign for legal reform following the death of his son Thomas in a single-punch attack drew almost 150,000 supporters.
Mother-of-five Nicole Perko received life-saving cancer surgery after a teenage student from Dubbo launched a petition to support her.
Mrs Perko was on a waiting list for peritonectomy surgery, which involves removing cancer from a large part of the abdominal area, at Sydney's St George Hospital when the petition was launched.
It won widespread support, with advocates including Russell Crowe, model Jennifer Hawkins, musician Clare Bowditch and the late Charlotte Dawson – the former wife of Mrs Perko's brother, Scott Miller.
In the wake of the campaign, NSW Health Minister Jillian Skinner announced that more procedures would be carried out at Prince of Wales Hospital, easing the pressure on St George.
Change.org's Karen Skinner said: "The strongest trend we are seeing is people supporting others who are telling their own story. People want to back the underdog."
She said the research showed women were dominant users of the site – 70 per cent of users are aged over 45 and two-thirds of them are parents. The largest single group of users are aged from 55-64.
The research also revealed that users weren't simply "clicktivists" and many had gone on to continue their activism by lobbying politicians or donating money to a cause.
"Some people say it's clicktivism, it's too easy and it's not a real commitment," she said. "That's not what we see. I don't think people are trivialising their support for an issue just because they see it on their Facebook page.
"We see ourselves as being an easier entry point for activism. Yes, online petitions make it easier to find out about an issue and get involved but it's not an end point."
