Has anyone ever been stabbed with a plastic fork? Those things hurt!
And I'm with staffsMike, regardless of any fears in place, couldn't they have just talked to her parents (after all the knife would no doubt have belonged to them). Theres no need to scare the beejesus out of her. I doubt it very much that there was any bad intent here, after all she was actually using it to cut her food. It's not as if you could pull out an AK-47 and claim you like your food peppered with shells.