The dildo tosser Christchurch nurse Josie Butler, yelled "that's for raping our sovereignty".
She was then taken away by police, but said on her Facebook tonight she was out of custody and no charges had been laid.
She was at yesterday's anti-Trans Pacific Partnership protest in Auckland and One News recently interviewed her at another rally against the agreement.
"I just thought it was a really good cause, and a good way of getting the community engaged," she said about why she'd shown up.
"With the signing coming up next week I thought it was really important that we take a really strong stand against this to protect the people of New Zealand, really.
"I'm here as a nurse because I'm worried about the patient rights and how many people will essentially die if this goes through because the price of medication's going up, so yeah, it's something I feel really strongly about."
Labour leader Andrew Little said it was "a creative item" to have thrown at a politician, but it was not rare for politicians to have objects thrown at them, such as "vegetable matter, clods of dirt, here at Waitangi actually".
"It's a matter of historical record. Things get thrown at politicians, not just insults.
"It is a creative item, I guess, to throw at a politician and perhaps the person throwing it thought there was a message in it. I can't imagine what that could be."
Told the woman had referred to taking away sovereignty, Mr Little said, "right". "The connection between sexual devices and sovereignty is not immediately apparent to me, but I think we should not underestimate the fact people are very hot under the collar about TPP."
Mr Joyce did not respond other than to promptly end the press conference at the time.
He seemed more amused by the incident than concerned. Asked if it was a first for him, he laughed and said "yes, it would be fair to say, under any circumstances".
The woman was spoken to by police for about 10 minutes before being taken away in a police car, giving a peace sign and thumbs up out of the window.
Greens welcomed ahead of Labour
Green Party co-leader Metiria Turei said she was happy to abide by the no-politics rule of Te Tii Marae at Waitangi as her party were welcomed onto the grounds ahead of Labour today.
The Opposition parties were to be welcomed on at the same time, but instead the Greens were taken on for a separate powhiri, leaving Labour leader Andrew Little and his MPs standing in the rain for an hour.
.@NZGreens rōpū waiting in the rain to be welcomed on to Te Tii Marae to show our commitment to honouring Te Tiriti. pic.twitter.com/LOamvW2Hqg
— Jack McDonald (@tautokai) February 4, 2016
Damp but undeterred!!! The welcome at Te Tii for @nzlabour @jacindaardern @JennySalesa @grantrobertson1 pic.twitter.com/NMOK5jrC4e
— David Clark (@DavidClarkNZ) February 4, 2016
Although they were not to talk politics on the marae, they were happy to show their colours - the Labour group was a blaze of Labour-branded umbrellas and flags.
The pelting rain and the absence of Prime Minister John Key has resulted in it being much quieter than normal for commemorations at Waitangi - only about 100 protesters arrived for their powhiri and were welcomed on to the marae without incident.
Key should have attended - Turei
The Prime Minister abandoned his plans to attend after Te Tii marae told him he could not speak about politics - a rule he said gagged him from responding to claims protesters against the controversial TPP trade deal were raising.
Ms Turei said today she believed Mr Key should have attended. She said Parliament had rules which limited what MPs could talk about and the Prime Minister could have taken the opportunity to listen rather than talk.
"He should be prepared to front up, not to put his opinion forward, but to listen to the people and their views."
She said she would abide by the rule. "It's their place and they set the rules and I'll follow what they set."
Ms Turei did not know if she would speak when the Opposition parties were led on. She had not yet decided whether she would mention the TPP, but said she would talk about sovereignty and the Treaty of Waitangi.
"Also the Green Party commitment to working for our people and our land."
She said while that might be political, she did not believe it was party political so would not offend the marae's request.
Labour leader Andrew Little said Mr Key showed a lack of leadership by not attending commemorations at Waitangi.
Just to clarify! I have been welcomed on to Te Tii marae already today. As I do each year, I arrived for kawe mate. pic.twitter.com/5lJZmYj40u
— Te Ururoa Flavell MP (@TeUruroaFlavell) February 4, 2016
Meanwhile, Maori Party co-leader Te Ururoa Flavell was at the marae to listen to the powhiri, having been welcomed on before the Prime Minister's decision to pull out.
He was going to go on again as a Government support partner, but the Government powhiri never happened - all other ministers and MPs followed Mr Key's lead and pulled out.
Key attending events in Auckland
It is the first time John Key has not done so since his first Waitangi Day as National Party leader in 2007, when he committed to return every year if he became Prime Minister.
Instead the Prime Minister will attend the NRL Auckland Nines tournament at Eden Park and other events in Auckland.
A spokeswoman for Mr Key said he would spend tomorrow in Auckland.
"The Prime Minister will celebrate Waitangi Day in Auckland where he will attend a couple of events, including the NRL Auckland Nines."
It will mean there is no Prime Minister at all at Waitangi this year - a rare occurrence that has not happened since Jim Bolger's reign in the 1990s when protests over the Treaty settlement process resulted in the official ceremonies being moved to Wellington.
Ngai Tahu leader Sir Mark Solomon would not comment on Mr Key's decision, beyond saying it was up to him. As well as the iwi leaders' talks, Mr Key, who is also Tourism Minister, will miss the opening of the new Waitangi Museum and his annual Waitangi breakfast.
