The badges are RFIDs powered by built-in batteries and one of the concerns was that the badges would be used to track students off-campus. Interestingly enough, the school district claims in court documents that "The badges do not work off campus." However, on their website the school district confirms that it is conceivable that an off-campus RFID reader could access badge serial numbers, but tries to downplay the significance:
Therefore, an intruder or “hacker” can only learn that the tag serial number is, for example, #69872331, but that does not provide any useful information.
Has the district committed perjury by claiming that the active RFIDs magically deactivate themselves when off school property even though they already know of a possible exploit?