CCTV cameras serve various functions depending on their type and placement. High mounted "eye in the sky" cameras can prevent crimes like car theft but often cannot capture perpetrator faces clearly. Dome cameras placed in public spaces like shops can provide full room coverage and have been linked to 23% lower crime. Regular surveillance cameras monitored clusters for security purposes like construction site theft monitoring. Home CCTV kits allow monitoring one's property but raise privacy concerns. While CCTV has aided investigations and is regulated in many cases, some argue it displaces rather than reduces crime and illegal public monitoring has occurred.