The Bar Code Tattoo by Suzanne Weyn

Individuality vs. Conformity
Identity vs. Access
Freedom vs. Control
The bar code tattoo. Everybody's getting it. It will make your life easier, they say. It will hook you in. It will become your identity.
But what if you say no? What if you don't want to become a code? For Kayla, this one choice changes everything. She becomes an outcast in her high school. Dangerous things happen to her family. There's no option but to run...for her life.