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Face recognition technology is worse. 1st amendment YouTubers are like “it’s my right!”, and then the unwitting subjects are in images that are owned by some platforms, and your face signature is in several databases
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You still need a frame of reference to compare it to. If someone's DNA or relatives DNA isn't in the system you won't get a match.
Edit: Also like many fake their death scenes the person changes the DNA records in the system to match the dead body they're using to pretend to be them.