Imagine you are hanging out with a few friends and some dude comes by and (somehow) manages to hit all of you and runs off. Later you see someone with similar clothes and physical features with his back to you. Personally I would punch him back with blind rage. That is what the kids are thinking on a larger scale. A man in a fazbear worker outfit killed them so they are hunting down ANYONE in a fazbear security suit not knowing it's NOT their killer. so basically it's one of the BIGGEST misunderstandings in fictional history.