Theft by radio waves?

Is RFID “contactless” card theft possible? Wendy Knowler found out.
Whether you know it or not, if you have a credit card, it is most likely an RFID one - that it is it has Radio Frequency ID, the technology which allows you to Tap and Go: place your card on a reader at the till point to pay for something, rather than inserting it and keying in a PIN.