A Texas student was suspended after she refused to wear a school-issued ID card implanted with a radio-frequency identification (RFID) chip. A judge has now blocked the suspension, but the case highlights concerns from privacy activists who fear the chips could be used by authorities to effectively “track” citizens. RFID chips are currently found in many passports and driver’s licenses, and one of their most common uses is allow faster processing at U.S. border crossings. [Source: Wired]