Originally Posted by
Cabbage Patch
I don't see why not. RFIDs aren't much more than a chip with an antenna attached. Most are passive, and only reflect information when they're hit by the proper interrogator signal (like the security tags that stores use for loss-control, or a pet finder chip), so they don't need batteries and they last forever, but they have very short range. The ones in the bait guns had batteries, and longer range, but their service life would have more to do with when they were activated, not how old they are. The interrogator is a fairly high powered radio, but it draws it's juice from batteries or the vehicle it's in. Neither component relies on satellites or the power grid to work. If the Mallers found a set of them inside a sealed building there's no reason to assume they wouldn't work just fine.
I still don't think this is what is happening, but I think it's definitely possible.