You can't refuse to be scanned by ICE's facial recognition app, DHS document say

This is going to be a huge pain. The US has a very fragmented identity system, and "move fast and break things" approaches like this to bring information from across government systems well outside the scope of what that information was collected for will result in real problems.

I worry what this app and systems like it might mean for me. I'm a US citizen, but I used to be an LPR. I never naturalized - I got my citizenship automatically by operation of law (INA 320, the child citizenship act). At some point I stopped being noodlesUK (LPR) and magically became noodlesUK (US Citizen), but not through the normal process. Presumably this means that there are entries in USCIS's systems that are orphaned, that likely indicate that I am an LPR who has abandoned their status, or at least been very bad about renewing their green card.

I fear that people in similar situations to my own might have a camera put in their face, some old database record that has no chance of being updated will be returned, and the obvious evidence in front of an officer's eyes, such as a US passport will be ignored. There are probably millions of people in similar situations to me, and millions more with even more complex statuses.

I know people who have multiple citizenships with multiple names, similar to this person: https://news.ycombinator.com/item?id=45531721. Will these hastily deployed systems be able to cope with the complex realities of real people?

EDIT: LPR is lawful permanent resident, i.e., green card holder

Your point about orphaned records resonates with me, but for a much simpler (or stupider) "use case". I took a domestic flight earlier this year and foolishly showed my British passport as ID. I had returned to the country the day before, it just happened to be in my pocket. My green card was clipped to the front of it. After checking the identification page, the TSA agent flipped through the pages of entry stamps, visas, etc. There, they found all my old US work visas, which have long since expired. The agent was convinced that, since I have expired visas, I must be here illegally and would have to "come with [her]". I pointed out that I have a valid green card, so I'm here legally, and that of course every visa in the book has expired because - well that's what they do. It took 30 minutes, multiple staff being called over, supervisors, etc before I was allowed to continue. At every step, the presence of the expired visas was a mark against me. Never got an apology or recognition that they were wrong, just eventually told I could be on my way. I truly fear that overzealous thugs will use any "evidence" to prove their presuppositions, like your orphaned records. (I've naturalized since then, and carry my passport card around religiously, for all the good it may do...)