A new way to "stick" it to the man - the RFID Duct tape Wallet. I have always been a fan of all things duct tape, or my favourite, Gaffer Tape. More colours and easier to work with. Decent gaffer tape is always available where dj supplies are sold.
This is the "tinfoil hat" of the currency carriers, but if it stops people grabbing your RFID details, maybe a bit of paranoia is called for.