I've seen far more scathing condescension and fury at Proof of Humanity than support.

Anywhere you'd point me for passionate pro-PoH takes?

Can you point me at the anti-PoH takes? I'd like to strongly agree with something today.

I haven't seen fury over Proof of Humanity. Maybe you're thinking of Sama's Worldcoin which is trying to scan the eyeballs of everyone on Earth to generate unique Ids? It was met with a lot of criticism over privacy and how it's being funded (much of the created new currency will go to its VC backers and Sam).

Proof of Humanity is definitely still an experiment, but has a much more open and less authoritarian design. Of all of the "proof of personhood" projects it has the most traction, especially within in the Ethereum community where its founder, Vitalik Buterin, has written a lot about it, including in his recent post on Soulbound:

https://vitalik.eth.limo/general/2022/01/26/soulbound.html

my personal favorite is "proof-of-Apple" [1]

[1]: https://news.ycombinator.com/item?id=31751203

What happens when I get a group of my friends to team up and challenge the "validity" of someone's id?

Alternatively, you can build a DAO on http://democratic.capital which uses passport verification as Sybil resistance.

which uses passport verification as Sybil resistance where the threat model is individual actors. Still vulnerable to nation states.

Yes, how much do you trust the 33 countries supported by Stripe Identity?

Sybil resistance is not easy to solve absolutely, it's all about degrees.

I got as far as it using a cryptocurrency and then noped right out.