Despite Tony Overheu emailing Mr Joyce an unreserved apology for Tuesday's stunt, the multi-millionaire CEO isn't turning the other cheek.
"The police are continuing their investigation and my intention is to send a message that this type of behaviour isn't acceptable and that I will have every intention of pressing charges," Mr Joyce told reporters on Wednesday.
Mr Overheu, 67, is a devout Christian and senior member of the Church of Christ and Full Gospel Business Men's Fellowship International.
He left a room of 500 people aghast when he strolled up to Mr Joyce and shoved a $25.95 lemon meringue pie in his face during a speech at a business breakfast at Perth's exclusive Hyatt Regency hotel.
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He revealed his modus operandi on Wednesday, saying he hid in a small gap between a screen and curtain on the podium and waited for two hours while the audience ate breakfast before emerging to ambush Mr Joyce.
Besides being arrested and attracting international attention, Mr Overheu is also in trouble at home.
He says his wife was furious for actions that were not consistent with Christianity, while one of his daughters posted a message on social media supporting same-sex marriage but saying "I love my idiot dad".
Mr Overheu read a statement on 6PR radio attacking influential companies that have been lobbying the government for same-sex marriage, including Qantas, Airbnb, Wesfarmers and Holden.
He said he was at a barbecue on the weekend in which other people were also "pee'd off" about "green left and corporates" subverting democracy by pushing for same-sex marriage without holding a plebiscite he says would reject it.
"It would appear Alan Joyce is part of a network trying to subvert the federal parliamentary process around the issue of marriage equality," he said.
"Figures overstepping the line have got to anticipate there will be push back.
"I feel very deeply about this theme of corporate bullying ... middle Australia completely rejects corporate bullying aimed at social engineering."
He linked the influence of "special interest groups" to the election of Donald Trump and Brexit vote.
He was arrested at the hotel and charged with giving false details to police but he's yet to be charged with the actual "pieing".
Mr Joyce, who is gay, released a statement saying there was a role for companies and CEOs to speak up on social as well as economic issues.
Liberal Senator Eric Abetz weighed in on the issue, calling for Mr Overheu's comments to be "unequivocally condemned".
"While I share his concerns about Qantas’ misuse of shareholders’ money, resorting to acts such as this is simply wrong,” he told SBS via a statement.
“Similarly, I am disappointed that some Australians took to making threatening calls to the staff of a Victorian hotel hosting a so-called ‘Safe Schools’ information session.”
“I call on all Australians – both supporters and opponents of marriage and ‘safe schools’ – to engage in a robust yet civil, calm and respectful debate.”
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