You summed things up nicely, furball, but the question is not so much one of what good and evil they can do, but what we think the good stuff is worth. There is certainly a lot of misinformation (e.g., many people believe that you could easily tag all kinds of things with RFIDs without people knowing, but since an RFID needs an antenna, that's not quite so easy), and a LOT of commercial interest in pushing this technology.
Overall, I think RFID is a good thing, but a few questions need to be sorted out, and the orgasmic praise on the one side and the paranoid hysteria on the other have to converge on some kind of common idea of how things can and should be done.
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