The worrying thing about National ID's is not such things as boarding planes, but the "off-brand" uses of the ID, eg, in our increasingly cashless
society, banks would be the first to adopt the use of the NID. Want to open an account? Cash a check? do anything at all with your money? Need an
NID...
How about online? Verify your identity when making credit card purchases - PUT IN YOUR NID#..
etc, etc..
Get a drink in a bar? Must have your NID - remember, even appearing to be old enough to drink does not mean you can GET one, even if you're 100 years
old, and your server asks you for ID, if you can't provide it, even today, the server is legally not allowed to sell you alcohol. It is not enough to
be over 21, you must have ID that proves you are, and that's just today..
Everything and anything you do can be tied to a unique ID number - admittedly that's already possible with the SSN, but that's not a valid form of
ID, and doesn't link your picture, thumbprint or anything other than your name to your #..
Of course, as a legal alien, I'm already in the federal system, image, prints, name, medical details, etc.. but even that isn't as much of an
invasion of privacy as this, because that's something I chose, and my "greencard", beyond being something I legally have to carry, doesn't really
get used unless I'm travelling outside the country - when I go home to the UK, it's actually a blessing, because a UK passport and a US greencard
gets you through the system at both ends of the trip far faster than anyone else.. no massive lines usually, just a special one for legal residents of
either country..
My greencard is sort of a standalone entity in other words, just something that I have, but rarely have to use for any purpose beyond travel, or very
rarely proving that I am legal to work in the US (not many companies ask for proof other than a SSN, but I have had to fill in the A# a couple of
times)..
a NID, though, I see as something all pervasive, necessary to life itself..



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Also to consider the executive orders that allow the seizure and use of all telecom the gov could easily use the wireless companies nationwide
coverage to tag maybe not everyone but "terrorists". 