Now this is an interesting bit of wildness....
When would you want to re-activate the tag?
Information Architecture > Service Oriented Architectures > New Ontario RFID guidelines emphasize "consumer consent"
Consumer consent must be obtained before personal information linked to a radio frequency identification (RFID) tag is collected, used and disclosed, according a new set of guidelines issued by Ontario's Information and Privacy Commission (IPC).The guidelines also recommend automatic deactivation of the tags at the point of sale. Consumers should be able to choose to re-activate the tags at a later date, repurpose them, or otherwise have control over the manner in which tags interact with RFID readers.