There are uses for RFID that need to be shielded until I say that I want them scanned
What exactly are those uses that can only use RFID? If you don't want it read remotely, don't put it on RFID. Just put the info on a mag stripe. Different tools have different benefits and drawbacks. There are alternatives.
Men of lofty genius when they are doing the least work are most active. -- Leonardo da Vinci