What do I think about biometric proof of personhood?

What do I think about biometric proof of personhood?

https://vitalik.eth.limo/general/2023/07/24/biometric.html

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btw @vitalik.eth, what about the most basic of exploits - scammers going around the world, claiming they are from Worldcoin and using backdoored Orbs to scan people's eyes? 

If people ask, "Where's my airdrop" they'd respond, "It's going to take one business day to update our database and send the money".