Nicholas Drummond, 20, had two assault convictions erased last week by a court after admitting punching two people in December, including a woman he'd earlier dubbed a "slut" and told to "put your tits away".

The decision, first reported by AAP, sparked outrage from various quarters including consent education advocate Chanel Contos and anti-violence campaigners.

Northern Tigers, the semi-professional football club playing in NSW's second-tier competition, also cut ties with the first-grade player this week, having read reports on Tuesday.

"We are extremely disappointed and do not condone Mr Drummond's behaviour," club boss Edward Ferguson said on Thursday, noting Drummond never coached at the club.

"In accordance with our club values and culture, we have a zero-tolerance policy for incidents such as this."

Drummond's female victim, who agreed to release an image of the outfit she was wearing when assaulted, said the public response had been "overwhelming".

"All the writers and campaigners who have shown an overwhelming amount of support, it made me feel that some sort of justice has been served as it was evident I wasn't alone," the woman, who asked to remain anonymous, told AAP late on Wednesday.

"Everyone is just shocked and disappointed by (the court's decision).

"Everyone has the same view."

Drummond, a former Knox Grammar student, called the woman a "slut" and told her to put her "tits away" when he saw her at The Greengate Hotel in Killara, the NSW District Court was told.

She repeatedly confronted Drummond, including when they ran into each other at another pub that night and she photographed him.

A melee ensued over the phone, leading to him being ejected and then punching in the head a stranger queued to enter Chatswood's Orchard Hotel.

He then punched the woman when she approached him again on his way to the train station.

Drummond pleaded guilty to assault and told the court: "I was brought up better and I know better ... I know violence isn't the answer especially not towards women".

A junior soccer coach, he was worried a criminal conviction could cost his Working With Children's Check, while his barrister cited Drummond's "very difficult" 2020, including the death of a family dog, a relationship breakdown and family illness.

Prosecutors opposed the appeal, but Judge Robert Sutherland accepted Drummond's offending was an aberration and deemed convictions not "necessary" in all the circumstances.

He reissued a 14-month good behaviour bond.

Ms Contos said the story was a reminder of "the injustices that are happening in our court system and the violence men are perpetrating every day".

"It tells us that privilege and entitlement are not only the reason gender-based violence occurs but also why no accountability is held," the Teach Us Consent founder told AAP.

Anti-violence campaigner Tarang Chawla urged against "cancelling" Drummond but said the court had told the offender there are "zero material consequences for his unacceptable actions".

"He should be getting mandated men's behaviour change, emotional intelligence counselling and anger management therapy," he said.

Caterina Politi, whose son David Cassai was killed by a one-punch attack south of Melbourne in 2012, said it was on "all of us" - not just schools or governments to make a change.

"People don't realise the devastation, the trauma, the injuries caused by these incidents," the Stop, One Punch Can Kill co-founder told AAP.

Having already been subject to appeal, there are limited further grounds to challenge the latest judgment.

NSW Attorney-General Mark Speakman said the way someone is dressed "is no excuse for violence" while noting judges could record no conviction where they believe it's appropriate.

"This is not a finding the offender is innocent and, unless unusual circumstances apply, a non-conviction outcome will not be repeated if there are further offences," he said.

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