RFIDs: love 'em or hate 'em?
Some people love radio-frequency identification technology, also known as RFIDs --- or more accurately, they love what the little antennae-and-chip combos can do: speed through toll lanes, enter their cars without turning a key or pay for a purchase by waving a card rather than swiping it.
Others shun RFID because they don't want to leave electronic tracks in their wake or fear that the methods of encoding data leaves them vulnerable. As more manufacturers and retailers use the tags to automatically follow their inventory from the loading dock onto store shelves, we're bound to encounter more RFID in our day-to-day lives in less-than-visible places.
While this has created a cottage industry for metal-lined wallets, you could take the DIY approach with aluminum foil --- or even an Altoids tin. Some people even go a step farther than experts advise and try to destroy the RFID tags in their credit cards or their passports (check out the directions here and here and here).
But remember: tampering your passport is literally a federal offense, punishable by a jail and fines. And if you're really worried about RFID, it might be easier just to request a tag-free card than to manhandle the one you have.
Don't know whether your card is RFID-enabled in the first place?
