First line of defense would be interfering with the target locating. Shield RFID devices (bank cards, RFID access cards, personal id cards), be careful with cell phones (shield or turn off), do not publish schedules, work against the increasing surveillance and facial recognition applications.
The target aquisition may well go beyond just visual. NFC devices are only NFC with devices that are to spec. Stronger transmitters, better receivers and a better antenna may increase communication range enough for useful aquisition.
On a tactical level it may come down to interfering with target identification and aquisition (e. g.: get rid of RFID devices and cell phones, conceal the head shape and the face, use an aerosol that clogs the camera).