Using RFID and wi-fi to track students

An anonymous reader writes: The BBC reports on a proposal to use RFID and wi-fi to track students wherever they go on campus: "Battery-powered RFID tags are placed on an asset and they communicate with at least three wireless access points inside the network to triangulate a location." At The Wireless Event in London, "Marcus Birkl, head of wireless at Siemens, said location tracking of assets or people was one of the biggest incentives for companies, hospitals and education institutions to roll out wi-fi networks." The article points out that integration of RFID and wi-fi raises the possibility that RFID can be used for remote surveillance.