I know of the question Bank account number and account holder in check exposed? , but the answers to it are quite US-specific (checks and such) and I live in the Netherlands.
Dutch banks are introducing Contactless payment on a wide scale; all customers of my bank (ABN Amro) will receive new cards with this ability in 2015. An opt-out is not possible, but on request a radiowave-blocking card holder is available.
The accompanying leaflet explains that it is possible for people with the right equipment to read out the account number from the card from close range, but that that is not in itself dangerous.
According to the linked Wikipedia page, in the US "the major network guidelines do not allow a contactless card to contain the cardholder's actual name, instead a placeholder name is used". In my case I don't know if my name can be found electronically, but it is clearly printed on the card and the attacker is standing at close range...
My gut feeling is that a bank account number should be more or less like an address and therefore doesn't need to be terribly secret, but are there any real risks involved if my name and account number do become known to criminals?