Let's say for example that one has a child who is experienced at emptying the dishwasher. They've done it for some period of time and except for an occasional utensil or plate that hasn't been properly cleaned ending up in the cupboard, and some whining about the task there has never been a problem.
You should make it a point to tell that child that the door of the dishwasher should never be kneeled upon. Trust me.