Is the RFID tag on Indian students in U.S. justified?

Indian students in the Tri-Valley University, U.S. are forcibly made to wear radio collars around the ankles that keeps a tab on their movements. Is the move by the U.S. authorities justified?

External Affairs Minister S M Krishna strongly condemned the reported forcible wearing of radio collars around the ankles of Indian students in the Tri-Valley University in U.S. and demanded severe action against those responsible for the “inhuman act”.