Could they change your retina? Maybe some surgery exists to do this, but it sounds risky/complicated!
That is, the thought experiment here is not that people interact with your retina identity, but with an address that has been confirmed to be associated with a living person. There will have to be ways to build "collective" groups in this landscape, as such there will have to be other webs of trust on top of it. Right?
To be clear, I'm not convinced world coin is a good idea, but I'm not sure this is a clear take down of it?
They were also, by law, not an identifier, because people then were smarter than people now. You can still refuse to give your SSN under any circumstance other than employment, and people cannot deny service based on that refusal.
Which is to say, we could undo that database if we wanted to. If society decided it collectively hated SSNs, the work to obscure that system, or to poison that well, would be far easier than with irises.
I had to do a quick check on this TSA scan just to confirm that an opt out was possible, seems they changed the language back in 2015 https://www.dhs.gov/sites/default/files/publications/privacy... (page 3) to make it less optional. Basically it sounds like you can say NO, but they can override your NO for whatever reason..
"TSA is updating the AIT PIA to reflect a change to the operating protocol regarding the ability of individuals to opt out of AIT screening in favor of physical screening. While passengers may generally decline AIT screening in favor of physical screening, TSA may direct mandatory AIT screening for some passengers as warranted by security considerations in order to safeguard transportation security."
I have never done more than metal detector or massage, and have been 1K flier.
A friend flies with no ID and a federal ankle bracelet. Also opts out of full body scan.
A motivated person could set up an LLC and do everything through that EIN. But few are motivated to protect their privacy.