I had no idea that hi tech pickpocketing had developed so far to make RFID cards (see story).
It seems that these cards which you will increasingly find on all manner of cards from Credit Cards to ATM cards to even electronic key fobs are actually somewhat insecure.
The data can be scanned easily so you need to look after your cards to make sure the data isn’t skimmed. For more information about the RFID card technology, you can watch this video