A system and method is disclosed for detecting the presence and level of wireless communications activity within a predetermined area, without disclosing the identity of the wireless users, and for generating a message to certain information and communications devices in response to the detection of a predetermined level of wireless communications activity within the predetermined area. The information detected also may include information relating to the general direction and rate of movement of detected wireless devices. The message generated in response to the detection of wireless communications activity may include wireless messages, including Short Message Service (SMS) messages, to persons desiring or needing to receive such information; messages to public officials and other interested persons; and automatic signals to devices such as computers, computer networks (including the internet and wireless networks), facsimile machines, signs, lights, loudspeakers, and other devices providing information through other communication and information media.