Re: Stun gun?
Common anti-theft labels are basically a tuned circuit, optionally with a smart widget powered by exciting the circuit, and what happens at the counter when you buy the item is that they blow a fusible link (usually by overloading the coil with a strong pulse) disabling or detuning the circuit. RFID works similarly, but it's designed to be not disabled so easily (although, given enough energy, anything electronic will croak).
Biting the hand that feeds IT
