Sure staff could have been involved, but then it's not a teachable moment, just another moment suffered in silence while the "authorities" handle the situation for her.
It may seem like a small event to you, but I'd suggest reading about what I like to call "death by a thousand papercuts" (via @skud). There are TONS of "little" things that happen everyday that can be dismissed as insignificant, but they add up to an unwelcoming environment.