My school has been great so far. It's a bit bumpy, but most of those bumps were just me being careless or something. Never has unfair punishment occured, until today.
Before I tell you the story, you need a little diagram.

So I had a bag of chips that I didn't want to eat. I push that chip to where it is in the diagram.
Jay pushes it to Alex, because Alex asked him to.
Alex drops it over the side of the table when picking it up. He looks under the table and retrieves it. Now by now we've noticed that the mean-ass lunch lady is behind him. Then she gives EVERYBODY AT THE TABLE detention, for "playing with our food". (keep in mind, there are more people sitting around my friends and i, i am just too lazy to draw more circles)
Everybody else asks her why they are getting detention and she says "because you was sittin here." She makes us all sign a paper with our names to give to the principal. When we say that it's unfair, she says that by playing with food we were wasting it for all the poor hungry people, when she's the one who doesn't give leftover food to kids who want it, she just throws the extras out.
After lunch we went upstairs and complained to our teacher. Fortunately, he was on our side, but there was nothing he could do. So, we went to the principal and told her our side of the story. She said she would think about it. Right at the end of the day she stopped us and told us that the lunch lady had a completely different story and we were most likely going to be helping with breakfast duty for two days. She said we'd share our stories in the morning.
I'm so pissed right now, but I need advice. I'm thinking of bringing my parents into it, because there's no way the very-differing story can be true at all.
tl;dr unfair lunch lady gives detention for dropping a chip to entire table of people, principal believes her completely in a most-likely bullstuff recap of the incident.