Abstract

We defend public anonymity in the light of the threat posed by digital technology. Once people could reasonably assume that they were fairly anonymous when they left the house. They neither drove nor walked around with GPS devices; they paid their highway tolls in cash; they seldom bought on credit; and no cameras marked their strolls in the park or their walks down the street. Times have changed. We begin with a brief discussion of the concept of anonymity. We then argue that public anonymity helps promote privacy in public. Next, we argue that public anonymity is worth protecting insofar as it promotes autonomy. After that we attempt to show how digital technology threatens public anonymity in the context of CCTV and GPS devices. We argue for a significant scaling back of public surveillance. We close with some thoughts on what we take to be the gratuitous costs imposed on those who would attempt to preserve their anonymity in public.