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In October, taxi drivers protested a plan to install GPS trackers in New York City's yellow cabs.
The Global Positioning System is a great tool for traveling through a maze of unfamiliar city streets — but it can also serve as an effective tracking device. As employers, government officials and even parents adopt GPS technology, critics worry that it will lead to violations of privacy.
Larry Magid, technology analyst for CBS News; co-director of ConnectSafely.org
Lee Tien, senior staff attorney at the Electronic Frontier Foundation
Scott Neuberger, CEO of Collegeboxes, a moving service for college students