Systems and methods for identifying suspected contraband mobile electronic devices within a confined community are provided. Details regarding said advertising opportunities are monitored from central advertising providers. A subset of the mobile electronic devices associated with advertising opportunities noting location measurements within a perimeter geofence of the confined community are identified and any such devices also associated with advertising opportunities noting location measurements outside of the perimeter are eliminated to arrive at a revised subset. The published details of the advertising opportunities for those mobile electronic devices in the revised subset are recorded.