The first rule of using RFID is don’t talk about RFID issues! At least, that may be the gist of this story I read from Dan Morrill on how the Mythbusters are prohibited from airing an episode on the insecurity of RFID chips. This was over on engadget as well as other places, just to throw some links around. If you have to supress information on insecurity, you have problems to fix!
You know, if a credit card company could implement RFID properly and securely and openly have it vetted and tested and beaten against, they might find some value in that. Knock-offs and theft aside, everyone should strive to be secure enough where full disclosure would not break the entire product/system down.