Tracking Students for Safety: The Tokyo Experiment and Controversy

In a world focused on security, some schools are exploring ways to protect students. Tokyo's Ricchio Elementary School has implemented a system where 4th graders carry wireless transmitters in their backpacks. These transmitters are detected by sensors at the school gates, logging the student's arrival on a central computer. This system sends an email to parents confirming their child's safe arrival. The system is being considered in the US, but concerns about cost and student privacy remain. Some parents argue that just because tracking is possible doesn't mean it should be implemented.

What has been the response to the Tokyo experiment with the tracking system from some Americans?

What arguments do some parents make against the introduction of the tracking system?