Every Chiefs player has been formally cautioned following the events which included the hiring of a stripper named Scarlette and the subsequent fall-out.
Hansen said he felt there could now be closure on the matter.
"It's good that it's cleared up because it's been disappointing for rugby and everyone associated with it," he said.
"I think the key thing to come out of it is some lessons and if those lessons are learned then that's one positive.
"For us it's been about focusing on what we've got to do. By association it's been hanging around us and we've got a test match to play and we're focused on preparing for that."
Asked what lessons had been learned, Hansen said: "I think they're pretty clear aren't they? Alcohol and young people, and you've got to put some clear, defined messages to those people about how they're going to conduct themselves ... it's no different to any young person who's drinking. They make mistakes.
"What's important about the culture is how you deal with the mistakes."
