Tech will get there (maybe it already has, who knows). But honestly, there’s no need for it given how easy it is to socially manipulate people. Just have a couple of Nostr influencers start a trend like:

"Send me your fingerprints, a DNA swab, and retina scans to... (reads card) prove that you are not one of the lizard people, and get a chance to be zapped 10k sats."

Folks here who act like they’re running the next Cicada 3301 would gladly mail all of that.

Plus, Occam’s razor: a real violent and malicious actor can "extract" fingerprints (or for another fifty quid, entire fingers…) pretty easily. No need for advanced tech when a cheap thug can do the job just fine.