The Chiefs have rubbished reports of a lifetime ban for the 15-year-old spectator who jumped the fence and tackled Brumbies captain George Gregan at the weekend.

However, CEO Gary Dawson says that is not the case and a more commonsense approach will be taken.

Dawson says they will sit down with police and the youth's family to discuss his punishment but it will involve a ban from a certain number of Chiefs games.

Earlier reports suggested the teenager that tackled George Gregan had been banned for life from attending all matches at Rotorua Stadium.

The teenager said he ran onto the ground to tackle Gregan in the second-half to win a $200 bet. The Brumbies players grabbed the youth and he was taken from the Rotorua Stadium field by Brumbies and Chiefs trainers.

The Chiefs have promised to upgrade security and chief executive Gary Dawson said he was appalled at the act.

"Player welfare is absolutely paramount and this sort of behaviour is totally unacceptable," he said.

Australian Rugby Union general manager was critical of security at New Zealand rugby ground.

Earlier this year, the crowd three cans at the Australian sevens team during the tournament parade at the Wellington sevens.

There were 30 security staff on the inside of the ground and 13 police within the stadium vicinity at during last weekend's incident. Police later escorted the boy from the stadium.

Dawson agreed with Brumbies coach David Nucifora who said after the game that not only was the incident "absolutely disgraceful" but so had been the reaction of the crowd in treating the offender like a hero.

Gregan said it was the first time he'd been tackled by a spectator during a match and said while it ended up being a bit of a non-event and that he was not injured it was worrying as a sportsperson to think such a thing could happen during a game.

"You shouldn't feel threatened on a sports field."