RFID chips - my $0.02
If the human versions work the same as the non-human (veterinary) chips, all the scanner reads is the number.
The number in and of itself means nothing without access to a database that matches the number with whatever info is stored in the database. In the case of pets, that is the info sent in by the owners themselves when they register the chip.
I would think that things would be similar on the human side, you'd need access to whatever database for a illicitly read number to mean anything. It is a little frightening that there could be access to this info by others than those it is intended for, but then again, there is already a lot of info about us out there already if one knows where to look. Ever Googled yourself? Educational.
All in all, I'm not much more afraid of this technology than I am of what might happen if someone stole my wallet, and at least the chip has potential benefits. Not that I'll be first in line to get them, but at least I'd seriously consider it.
Some of the paranoid claims I've heard/read various places about these chips being able to be tracked by satellite are just absurd. These chips are not transmitters - they are passive converters, relying on energy from the received radio waves. If a satellite is putting out that much energy, we're all getting a good internal tan.
From personal conversations with someone in the industry, the best scanners they have can read a chip when the dog walks through a doorway sized opening - similar to antitheft devices at stores - but the FCC won't let them be used.
Worst case scenario: Even if they could somehow track the chip from space, and the government goes all fascist on us, or something similar that makes me want to be a resistance fighter, the chip comes out and goes away.
Best case scenario: I'm in the emergency room unconscious with no ID and they immediately know I'm asthmatic with multiple drug allergies, including penicillin. Save my life? Sure, sign me up.
Sorry for the diatribe, but at least I didn't get too political or at all religious.
And, Eric's Grandma: Googling one's self is not a euphamism for something morally reprehensible... :-D
RE