Fundamentally at some point there has to be some trust. Equally you could slap your own RFID tag over someone elses (perhaps inducing a high enough voltage to k

Fundamentally at some point there has to be some trust. Equally you could slap your own RFID tag over someone elses (perhaps inducing a high enough voltage to kill theirs first). We already have issues with bank card scanners placed on ATMs. I don't think we've really solved the problem beyond user awareness and frequent monitoring.