I have a concern! A technical one:
RFIDs work in 900 MHz. That's OK. But hand-held GSM Jammers also work close to the frequency ranges of the RFIDs. This means that someone with a hand-held jammer can block the functionality of an RFID completely. It is OK to be smarter with RFIDs but it should not introduce vulnerability. RFID hot spots shall be equipped with jammer detectors in important places that may pose a risk to public or immediate policies should be implemented.