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A great deal is at issue in the handling of the threat of terrorism in the United States today. Restrictions on the use of public space are a direct consequence, at the urban level, of what is happening. But beyond that, and beyond the various abuses of civil liberties and common sense that have been involved in the governmental misuse of the threat after 9/11, the most serious misuse may be the sale of the threat as a threat to existential security instead of as one danger among others to public safety. It has been manipulated for purposes having nothing to do with terrorism. The intended result has been to reinforce the positions of those in power, to displace the insecurity inherent in a capitalist free market system, and to limit further the freedom that is at the heart of the right to the city. The current treatment of public space illustrates the process.

Photographs of 17 urban recreation sites in Chicago and Atlanta were evaluated by college strudents (n=68) in Illinois, Georgia, and Michigan, for either perceived security, scenic quality or both. For most raters, high visibility and developed park features significantly enhanced perceived security. Scenic quality, on the other hand, was enhanced for the majority of evaluators by a high degree of naturalness and vegetation. For both perceived safety and scenic quality a small minority of raters held preferences quite different from the majority.

Despite the fact that virtual environments are increasingly deployed to study the relation between urban planning, physical and social disorder, and fear of crime, their ecological validity for this type of research has not been established. This study compares the effects of similar signs of public disorder (litter, warning signs, cameras, signs of vandalism and car burglary) in an urban neighborhood and in its virtual counterpart on the subjective perception of safety and livability of the neighborhood. Participants made a walking tour through either the real or the virtual neighborhood, which was either in an orderly (baseline) state or adorned with numerous signs of public disorder. During their tour they reported the signs of disorder they noticed and the degree to which each of these affected their emotional state and feelings of personal safety. After finishing their tour they appraised the perceived safety and livability of the environment. Both in the real and in the simulated urban neighborhood, signs of disorder evoked associations with social disorder. In all conditions, neglected greenery was spontaneously reported as a sign of disorder. Disorder did not inspire concern for personal safety in reality and in the virtual environment with a realistic soundscape. However, in the absence of sound disorder compromised perceived personal safety in the virtual environment. Signs of disorder were associated with negative emotions more frequently in the virtual environment than in its real-world counterpart, particularly in the absence of sound. Also, signs of disorder degraded the perceived livability of the virtual, but not of the real neighborhood. Hence, it appears that people focus more on details in a virtual environment than in reality. We conclude that both a correction for this focusing effect and realistic soundscapes are required to make virtual environments an appropriate medium for both etiological (e.g. the effects of signs of disorder on fear of crime) and intervention (e.g. CPTED) research.