On the surface, things don’t bode well for Screen Free-Week, the national awareness campaign run by the the Campaign for a Commercial-Free Childhood. Yet for the first time in a long time, director Susan Linn is feeling hopeful. Even as smartphone and tablet sales rise, Linn senses a small but rumbling backlash, and a realization that it isn’t just kids who need help controlling screen addictions. There’s something about human psychology that makes a connection, once open, hard to close.