Qantas has banned a pensioner for life from flying with the airline for slamming a lemon meringue pie into the face of the airline's chief executive Alan Joyce.

Tony Overheu has been charged with common assault for hiding behind the stage and ambushing Mr Joyce at a business breakfast in Perth last week.

A week after that incident, Daily Mail Australia understands the 67-year-old pensioner has been banned for life from flying with the airline.

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Tony Overheu ambushed Qantas chief executive Alan Joyce at a Perth business breakfast

Pensioner Tony Overheu has been slapped with a lifetime ban from flying with Qantas

It's a common procedure for Qantas to ban people from travelling with the airline if they assault an employee in their workplace or at a function where they are representing the company.

Mr Overheu is opposed to gay marriage and wanted to make a statement about Mr Joyce using his position as CEO to campaign for a change to the Marriage Act.

On Tuesday last week, Mr Overheu left a room of 500 people in shock when he walked up to Mr Joyce and shoved a $25.95 lemon meringue cake in his face during his address at Perth's upmarket Hyatt Regency hotel.

He later told Daily Mail Australia his actions were a stand against 'corporate bullying' and said he had carefully selected the cake as it was soft and unlikely to do any injury to his target.

Qantas CEO Alan Joyce told reporters he pressed charges to send a message about the man's behaviour

Mr Joyce last week said he pressed for charges to send a message 'this type of behaviour isn't acceptable'.

Former Labor leader and media commentator Mark Latham has criticised Mr Joyce for pressing charges against Mr Overheu.

'Once you start campaigning like a politician, you've got to expect the odd form of protest,' he told Daily Mail Australia.

'If I was ever hit in the face by a soft pie, a cream pie, you wouldn't think for a minute about trying to get this guy locked up.

'Alan Joyce should be big enough to say, 'I'm out there campaigning politically. The guy hasn't tried to harm me physically.

''I wasn't hurt physically. I'm not going to press charges against a 67-year-old pensioner'.'