No zombies at the post office. No one on the phone either. Abby yelled at them. She and I agreed that it was actually a pretty nifty system: The phone always gives a busy signal. No one from the outside can reach you. In Stephen King’s book “Cell,” a pulse sent through phones turns people into zombies. With their work phone dismantled, if they never pick up their cells, those people in the post office are 100% safe. They cannot be turned into zombies through phone pulses.
For that matter, they can avoid many other unpleasant tasks, such as dealing with demanding customers, being asked to pick up milk on the way home, and communicating with people in general.