I really don’t know where you are going with this. They don’t go out eating plastics and whatever either. They get sick because they’ve eaten something contaminated (what happens way more often on the wild) or because they failed to distinguish the food (what also happens way more often on the wild).
There’s no appropriate time or place for Scrum or any other “agile” methodology that has a name.
There may be some appropriate usage for some methodology your team creates in a meeting. Never for those pre-packaged ones.