Organized surveillance strategies include use of police and guard patrols. Territorial reinforcement involves creating physical designs that enhance or extend the sphere of influence so that users develop a sense of proprietorship. This sense of territorial influence can alert potential offenders that they don't belong there, they are at risk of being seen and identified, and their behavior will not be tolerated or ignored. Natural access control and surveillance contribute to a sense of territoriality, boosting security by encouraging users to protect their turf. Organized territorial strategies typically include neighborhood crime watches, receptionists, and guard stations.
Mechanical strategies can be perimeter sensing systems.
Natural territorial strategies include fences, walls, and landscaping. Provide clear border definition of controlled space. Common law requires that space be defined to preserve property rights. Boundaries may be defined physically or symbolically. Fences, shrubbery, and signs are acceptable border definition.