[Gaffer]

That would be fine if you could get them close enough to a reader. Do that, but also barcode their head so they can be scanned like license plates with those IR laser scanners..... Barcode them right on the back of their right hand.

[itsahoot]

but also barcode their head so they can be scanned like license plates with those IR laser scanners.....

Bar codes do not have to be visible, to humans, to be read.