Some parents and critics argue that the book focuses heavily on consumerism. A lot of the "dork" status is tied to Nikki not having expensive clothes or an iPhone. The clash between the "haves" (Mackenzie) and the "have-nots" (Nikki) is often defined by material goods.
Nikki’s life gets more complicated when her mom gets a job as the school’s new lunch lady — a job Nikki begged her not to take because of the social embarrassment. Now, Nikki has to watch her mom serve sloppy joes while MacKenzie and her friends whisper and point.