Why is David Petrakis Melinda’s “ hero”?

David is Melinda's hero because he not only talks her into calling out Mr. Neck, he goes the extra yard and threatens hom with a lawsuit.

David's parents have hired a big, nasty, expensive lawyer. He is threatening to sue the school district and Mr. Neck for everything from incompetence to civil rights violations. David's tape recorder is allowed in class to document "potential future violations." The
secretary doesn't sound too upset at the idea that Mr. Neck could get canned. I bet she knows him personally.

David must have mentioned the hairy-eyeball treatment to his lawyer that afternoon because the next day there is a videocamera set up in the back of class. David Petrakis is my hero.