Wearing a hoodie is an easy way to hide ones identity even though they may seem harmless. It disguises the wearers face so school officials won’t know who is entering or leaving the school. If a stranger/random adult were to walk in they might not notice because hoodies allow them to blend in. This can lead to bigger issues.... (hope this helps! I’m not sure if this what you meant by lead in or if it counts but I hope you can work off of it!)