Percy didn't stand up to Nancy Bobofit because he was already on probation and couldn't risk any trouble.
Percy and his mom eat a lot of blue food because she got into an argument with Gabe that she couldn't make blue food, so she started going out of her way to make blue food.
Percy avoided confronting Nancy Bobofit due to fear of repercussions while Mrs. Brunner's warning about danger made him leave quickly. Their blue food tradition originated from a playful challenge with Gabe, and Nancy ultimately faced retribution for her bullying. These incidents highlight themes of fear, consequence, and tradition in Percy's life.
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