An electronic pickpocket can steal things off of your RFID-enabled devices with ease. By using a concealed RFID reader, a person can gather information on RFID chips from several feet away. The user does not require a direct line of sight just to get that content stolen either. This is a significant problem that could make it easy for your data to be stolen.
A person could steal your credit or debit card information. If that person captures an identification badge you use, that person will get personal information on who you are with that content varying based on what you have added to the card.