Why are DoC and marine mammal scientists so cautious about such encounters? There is widespread evidence that interactions between people and marine mammals can have negative outcomes.
Let's remember that orca and dolphins are predators. They hunt and kill to survive. They are large and powerful animals, and while there are no records of them harming people in New Zealand waters, the possibility remains - even if it is not deliberate.
What is more likely is that the marine mammals themselves might be harmed, either through ignorance or through ill-intentioned attempts to swim, ride or otherwise capture an experience that could bring fame via social media.
Such self-serving attempts to garner attention are becoming more common worldwide and, now, locally.
I hope that few in New Zealand would disagree with the notion that wild animals deserve our respect and care. To translate the idea into reality, take a lesson from recent events.
If you are fortunate enough to be approached by a marine mammal while out enjoying the great outdoor recreation opportunities our coastal waters provide, then slowing to a respectful speed - or stopping and watching quietly - is the best strategy.
That way the choice to approach and to move away becomes the animal's, and we are left with a powerful experience of the special connection that exists between us and our mammalian cousins living in our seas.
We can also then draw satisfaction from the knowledge that our behaviour has shown them the respect they deserve.