Yesterday Lisa Lewis, who was fined $200 for her 2006 bikini-clad streak during an All Blacks vs Ireland test at Hamilton's Waikato Stadium, was disgruntled that Ms Kupa got off scot-free.
Lisa Lewis has been objected to inconsistent treatment.
"All streakers/pitch invaders should be charged the same."
Ms Kupa should also have been charged with indecent exposure given that she was naked, and assault due to the slap on Israel Dagg's behind, Ms Lewis said.
Christchurch builder Adam Holtslag, 28, was this year convicted of offensive behaviour and fined $500 for his streak at Dunedin's Forsyth Barr Stadium.
Yesterday he was shocked that the same treatment wasn't given to Ms Kupa, saying it was "a bit one-sided".
"She touched a player. And she was showing a bit more than me anyway," he said.
Yesterday police said they stood by their decision but had learned from the incident and future streakers could be treated more harshly.
"I believe that our staff made the right decision based on the information available to them at the time and given the particular circumstances of the incident," Eastern District Commander Superintendent Sandra Venables said.
"That said, with the benefit of hindsight, we are mindful of the wider implications in this case."
Earlier, police said the decision was based on the lower level of her offending, her attitude when arrested and the fact that she was sober.
New Zealand Rugby, in a joint statement with police, said pitch invaders risked serious consequences if they disrupted a game.
NZR chief executive Steve Tew said he was disappointed Ms Kupa managed to slip past security and at the decision not to charge her.
"It is important to remind people foolish enough to think about trying to take to the field - clothed or not - they are putting their own safety and that of the players at risk."
