Hansen told Radio Sport in February, 2014, that the Luatua situation was a reminder of how vulnerable players were to having any misbehaviour exposed.
2014: Steve Hansen's social media warning
"I think there is one thing you have to accept now as part of the All Blacks is that you all knew if you are putting yourself in a situation where you are going to be filmed or put on YouTube, people are going to have an opinion about that," Hansen said.
"Whether that's right or wrong, that opinion, is irrelevant. It's like perception. Perception is reality and the only way you can change it is not changing them but changing what you are doing.
"So just be mindful of what you are doing.
"If you're going to have a few beers, don't film it."
Smith's problem at the airport doesn't appear to be alcohol-related but Hansen's words were prescient.
And the world's best halfback will be wishing he had taken heed of them.