For simplicity sake, let's use a hypothetical disease to illustrate a common way that SNP genotyping arrays could be used. Suppose that the public outcry over rude cell phone behavior — loud, innane, and inappropriate conversations in public places — reaches such a pitch that the government decides to fund investigative research looking for a treatment. Scientists hope to find some sort of genetic basis contributing to the behavioral phone disorder and to then develop a drug that can treat it.