First, the use of electronics should be prohibited from the classroom because it constitutes a distraction to self and others. Even at 50 minutes, a university lecture can be a hard grind. To grasp the concepts and materials at hand it is imperative to keep one’s focus razor-sharp. Electronics, though, are often distracting and disruptive to class proceedings. This is because when students are handed free rein over the use of their devices, most will sooner or later give in to the temptation of eyeing Twitter feeds or reading personal emails. When this happens, the individual in question will lose track of the topic broached. And even if she manages to cast her mind back to the lecture coverage, it may be too late to plug the gap in understanding. But more than this, the use of laptops also harms the learning of others. When a laptop screen glows, the attention of those around it may be pulled toward its enticements, whether they be a piece of breaking news or a funny Twitter meme. These forms of visual pollution create a negative externality—to borrow a concept from economics—upon those not typing away at their laptops. Given the cost of distraction that lurks behind the use of electronics, barring its use from the classroom is both necessary and desirable.