There are several ways to deactivate RFID-Tags. The industries are RFID-
deactivators sends the RFID-Tag to sleep. A problem with this method is,
that it is not permanent, the RFID-Tag can be reactivated. Other methods
to disable the tags require complicated procedures that are impractical.
But the flash from a disposable camera generates a electromagnetic field
that will send a strong shock of energy to the RFID tag and some part of
it will blow, thus deactivating the chip forever.
Code:
https://events.ccc.de/congress/2005/wiki/RFID-Zapper(EN)