Man. Didn't I read about this in a science fiction novel in high school? Freaky.

Human chips more than skin-deep

Advocates of technologies like radio frequency identification tags say their potentially life-saving benefits far outweigh any Orwellian concerns about privacy. RFID tags sewn into clothing or even embedded under people's skin could curb identity theft, help identify disaster victims and improve medical care, they say.

Critics, however, say such technologies would make it easier for government agencies to track a person's every movement and allow widespread invasion of privacy. Abuse could take countless other forms, including corporations surreptitiously identifying shoppers for relentless sales pitches. Critics also speculate about a day when people's possessions will be tagged--allowing nosy subway riders with the right technology to examine the contents of nearby purses and backpacks.