When Marissa Mayer was appointed CEO of Yahoo! she was celebrated as a role model for women aiming to hold executive job titles, but her recent decision to ban working from home hasn't been met with much celebration. The edict has angered many Yahoo! employees and sparked a debate that rippled far beyond company walls this week. Co-founder and president of the Families and Work Institute Ellen Galinsky and Forbes Contributor Margie Warrell weigh in.