NSW Greens MP David Shoebridge has suggested police acted with "gross overreach" when they arrested him and several others during a climate protest outside Scott Morrison's prime ministerial residence.

Mr Shoebridge was one of 10 people arrested for disobeying a police direction to move on outside the Kirribilli residence on 19 December.

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Dozens of supporters gathered at Manly Local Court on Thursday to support Mr Shoebridge and the other activists charged over the protest.

The NSW Greens MP said the police action during the protest was "overreach" and on Thursday pleaded not guilty to disobeying a police direction.

"This was gross police overreach," Mr Shoebridge told reporters outside court.

"There was no proper basis for police to issue the move-on orders and send the riot squad in.

"This was clearly an act of intimidation designed to break the will of protesters."

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The matter was adjourned until January 31 at the Downing Centre Local Court.

Mr Shoebridge has pleaded not guilty.

Green MP David Shoebridge (@ShoebridgeMLC) arrested outside Kirribilli House after failing to comply with a move-on order.#ClimateProtest #sydneysmoke pic.twitter.com/JzE0rsYKkS — River McCrossen (@RivOMac) December 19, 2019

Two other protesters - Angela Michaelis and Ellen Roberts - pleaded guilty in the same court, with Magistrate Mark Richardson giving them a nine-month good behaviour bond without conviction.

The remaining seven protesters did not enter pleas and their matters were adjourned to 31 January at Downing Centre Local Court.

Izzy Raj-Seppings, the 13-year-old who made headlines when she was moved on by police during the protest, said it was "terrifying" when the riot squad arrived.

SBS News/Rosemary Bolger

The teenager was not arrested but said she was "humiliated" when the police ordered her to move on.

READ MORE Climate protesters set up tent city at Kirribilli House to wait for Scott Morrison's return

"I felt like I had done something wrong, I felt like I was a criminal but I was one of the lucky ones," she told reporters outside the court.

"We have the right to demonstrate. It's horrendous they came and shut it down."