Protect your privacy! RFID chips are open invites for identity theft.
RFID chips are one way transmitters of information. They've been fitted into the newest credit cards. Unfortunately, they continuously broadcast all your confidential account information and are very easily hacked.
We've got the recipe for RFID destruction!
The easiest way to effectively deactivate an RFID chip is with brute force. Others have suggested nuking it in the microwave, cutting the silicon line to the antenna, or cutting it out with a knife. Unfortunately, these methods are a hassle and dangerous (the microwave method has been known to set fires).
FederalJack.com shows us how to destroy the RFID chip without disabling your credit card. To make sure your ID is free of RF, check out this video on scanning them from our friend Xeni at BoingBoingTV.