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A new bill in the California legislature would ban the use of radio frequency identification (RFID) tracking in any personal identification system used by the government. That would include driver's licenses, library cards, school ID cards and more.

It's a response to an RFID test in a Northern California school district, in which students were issued RFID-enabled cards without community input. The district could track the students' movements. But school officials ended the test after a public outcry.

RFID critics fear the privacy implications government tracking, and fear that unauthorized people can track those who are carrying RFID.

Guest: Mark Roberti, editor of RFID Journal