If they figure this out I would think that a free car wash is not really what they are after. I have been using the RIFD tags since the 90s for my wash card setup. Last week a a guy who has one of our wash cards said he was working out of state at a site that required him to be escorted into different areas by personel with a RFID pass. He said he had been working there for a while and it was always a hassle to wait for the people to come let him in. He remembered he had my RFID wash card and decided to try it one day. It worked and let him in so the rest of the time he was on assignment he just used his wash card to get into the secured facility.