Minhag Manhattan: Do I Need to Avoid Automatic Doors and Lights on Shabbat?
M any stores in Manhattan have automatic doors that open when someone approaches. On Shabbat, is one required to avoid walking close to these entrances, even when one has no intention of entering the store? Must one walk on the other side of the sidewalk, or even cross the street, to avoid activating the doors? A similar question comes up in apartment buildings with motion-activated lighting. May one walk through a hallway or stairwell knowing that lights will turn on? Jewish law distinguishes between, on the one hand, deliberately performing a prohibited action on Shabbat and, on the other hand, doing something permissible that happens to produce a prohibited result. For example, dragging a chair across the ground might create a groove in the dirt, which is prohibited on Shabbat since it is the action of “plowing.” But if one's only intention is to move the chair, and creating a groove is not inevitable, the action is permitted. This is based on a principle known as davar she'...