A group protesting at the Government Communications Security Bureau bill have taken their fight to the Wellington home of United Future MP Peter Dunne, prompting him to call them "irresponsible scum".

Eight protesters were outside his home in Khandallah yesterday afternoon, calling on him to cross the floor and vote against the bill.

Mr Dunne, who was not home at the time of the protest, said the "hardcore group" were at his house with a loudhailer on Sunday, past 11pm on Monday night, and also yesterday morning at 7am.

He was concerned his wife and neighbours were being intimidated by the group, whom he said were "irresponsible scum".

"They are the lowest form of life imaginable. If they think they are going to persuade anyone to their point of view with these tactics, they're frankly deluded."

The Ohariu MP's vote is vital in ensuring the Government Communications Security Bureau bill becomes law. The bill would make it easier for the intelligence services to spy on New Zealanders.

Protester Ariana Paretutanganui-Tamati said they were at Mr Dunne's home "to give him a taste of what it feels like to have your privacy intruded on".