A man accused of booing the Welcome to Country at an Anzac Day dawn service attended a prominent neo-Nazi rally last November.

Eli Toby, 24, was allegedly part of a group that booed for 66 seconds during the service, considered sacred, at Sydney's Martin Place on Saturday.

When confronted outside his parents' home in Penrith, where he lives, Toby refused to apologise for the alleged act.

Instead, he questioned a 7News reporter, 'How'd you find me?'.

When asked if his parents knew about his alleged dawn service disruption, he said: 'I haven't told them yet. I'd rather you guys not tell them.'

Toby was previously identified as being part of the National Socialist Network that held a rally to 'abolish the Jewish lobby' outside NSW Parliament House last year.

Of his alleged actions on Saturday, Toby said he 'should be able to say what I like'. 

'The Welcome to Country's not right,' he claimed. 'Because it is designed to humiliate the memory of white Australia.'

RSL President Peter Tinley said he was confused by the booing.

'It was the opportunity for us to come together and reflect on what it is to be Australian and how enjoyable this country is,' he said.

'For some people to feel the need to make a statement like that, I'm quite confused as to what that statement is, quite frankly.

'There's 364 other days they can make that statement, and why would they choose today?'

The RSL has since said it is reviewing the ceremony.

Many Australians were left deeply upset by the protest being held on an occasion of remembrance. 

During the Sydney service, after the booing and jeering had been stopped, applause and cheering rang out to show support for Uncle Ray Minniecon who was giving the traditional welcome from Indigenous people.

When asked if the dawn service was the appropriate venue for the alleged demonstration, Toby said: 'I haven't really given it much thought to be honest.'

Toby was charged with an act of public nuisance and released on bail.

He is due to front court in June.