I never had a card or pin number at school. Please enlighten me, what do the cards get used for? Lunch koney? Coursework? What are some potential abuses? C

I never had a card or pin number at school. Please enlighten me, what do the cards get used for? Lunch koney? Coursework? What are some potential abuses? Can the pins be changed? It doesn't seem like this story is getting any traction, so maybe you better provide more details.