ACT says what happened at the Posie Parker rally in Auckland is seriously concerning.

Thousands protested against the views of the anti-trans activist at Albert Park's Saturday rally, seeing her quit the country early.

Scuffles broke out, Parker had tomato juice poured on her, and Green MP Marama Davidson was hit by a motorcycle.

ACT Deputy Leader Brooke van Velden told Kate Hawkesby that it's what the party has feared: that the alternative to free speech and reasoned debate could become bullying, intimidation, and violence.

She says in a civilised society like ours, you should be able to counter ideas you don't like with speech and debate, not violence and intimidation.

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