Members of a neo-Nazi group were allegedly heard discussing CCTV at Adelaide Oval and on Adelaide's public transport system, a court has heard.
Cameron Brodie-Hall, 21, is charged with possessing extremist material and possessing a document for terrorist acts.
South Australia's District Court heard the documents related to "achieving mass awakening by taking down the system" and condoned successful terrorist attackers.
Mr Brodie-Hall, of Dudley Park, has asked the court to release him on home detention bail to live with his mother, an application that was strongly opposed by the prosecution.
The prosecutor told the court the young man identified as a Nazi and was a member of an extremist and racist far-right group that was under investigation.
The court heard authorities had been monitoring the young man for some time and surveillance operations had captured group members talking about Adelaide Oval and the public transport system.
"Surveillance which was conducted by police shows the applicant continuing to meet with other members of the nationalist socialist network throughout 2020," the prosecutor told the court.
"During one of these meetings the group members were heard by surveillance members to talk about Adelaide Oval, about the Adelaide transport system and the cameras covering both."
The court heard when Mr Brodie-Hall was interviewed by police and asked to explain what the far-right group was about, he said "preserving white Australia".
The prosecutor said it was concerning that Mr Brodie-Hall had continued to engage with the group, even while in custody, with monitored phone calls revealing he spoke to the national leader of the group, referring to himself as a Nazi, and ending the call with the slogan "blood and honour".
"The applicant has continued to show an interest in this ideology and this type of offending," the prosecutor told the court.
The court also heard that Mr Brodie-Hall attended an Australia Day rally last year with other group members, holding up a sign on a bridge that read "conquered not stolen", and making Nazi salutes to oncoming traffic.
"The nature of the allegations, against the background I've outlined, are such that the court cannot be confident the accused will comply with bail and refrain from reoffending and will continue to engage with the ideology of this group," the prosecutor said.
Accused likely to show up for trial, lawyer says
Mr Brodie-Hall's defence lawyer Craig Caldicott said his client was contesting the charges and would have to wait a year in custody for his trial to start.
He said Mr Brodie-Hall's mother, who attended court, was willing to act as his bail guarantor.
"Is he likely to reoffend? The short answer is, we respectfully submit, no, not under the kind of restrictions we're talking about on home detention bail," Mr Caldicott said.
"Is he likely to show up for his trial? The short answer is yes because his mother is prepared to put money on the line."
Mr Caldicott said the prosecution case was "not particularly strong" and his client had the presumption of innocence.
Judge Nick Alexandrides refused bail, based on the gravity of the alleged offending and the risk to the public.
