The protester who doused an anti-transgender activist with tomato juice says she'd do it again - and again, and again.

After the drenching, British campaigner Posie Parker left her rally in Auckland's Albert Park on Saturday, cancelling her speaking event.

Eli Rubashkyn says if it means she has to go to prison, so be it.

"This is my country that gave me safety, that gave me the right to be the person I am, and I will not let anyone take that away from me."

About 2000 trans-rights supporters attended the event, with sympathy demonstrations in Christchurch and Wellington yesterday.

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• Posie Parker protest: Brian Tamaki leads anti-trans protest in Auckland CBD
• Posie Parker doused with juice, quits Auckland rally; Wellington event cancelled
• Free Speech Union: People who disagree with Posie Parker can voice their opposition freely
• JK Rowling blasts Auckland protest as 'repellent' as Posie flees NZ