Whose the unfairest in the land?

My daughter came home today and explained a happening at school that she felt was entirely unfair.  Have you ever experienced that with your child?  She told me about a boy in her class who allegedly stole a bag of chips...she is sure he didn't.  The ladies in the cafeteria performed their own kind of CSI on the alleged potato chip bag and deduced that while it carried the same expiration date as other bags in the cafe, they were NOT of the same batch.  The lady said she would give the boy a referral, he said "fudge" after she walked away.  A trouble maker in the class told the lady that the boy called her a "f*$@!"  She wrote that on the referral, too.  My daughter, being the consummate seeker of justice, approached the lady to tell her what really happened and what was really said.  The lady very plainly told my daughter not to try to change the story and try to get her friend out of trouble.  Tsk, Tsk on the lady.  Am I wrong?  As a parent, I would be really unhappy to hear how incredibly ill mannered my child was being and give him/her consequences accordingly.  As a child, I would be angry, hurt and embarrassed to be accused and treated this way when I had done nothing wrong.
I hear kids all the time stating how unfair "it" is...whatever their "it" may be.  I was lucky to be blessed with a child who is reasonable, understanding and mostly congenial and cooperative.  She really is incredible!  So when she comes home and starts talking about how a child at school has been treated unfairly, I stop and listen.  "It's not fair" is not a phrase she often utters, and after what I saw how some of the parents at her school behave, it is no surprise that someone at school would be treated unfairly.
Could you imagine your child being accused of stealing and cursing, when in fact, they did not do those things?  Think about it, what is your reaction when the school principal calls you at work and says "Mrs. X, little Y is in the office with a referral for stealing and cussing out the cafeteria lunch monitor."
Do you condone this behavior in your home?  And if the person on the other end of the phone is someone of authority in your child's life, aren't you going to be expecting them to tell the truth?  And lets face it, some parents are more harsh than most.  What kind of message does it send to the child, who is not guilty, but is treated as such?