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Regarding #2, ChatGPT pointed me to this: https://unicode-org.github.io/icu-docs/apidoc/dev/icu4j/com/ibm/icu/text/SpoofChecker.html
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We only allow alphanumerics and underscores in nyms, so WeAreAllSatoshi implemented a Damerau–Levenshtein distance IIRC.
But time is better spent removing friction right now given how friction-full the onboarding is.
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The problem with levenshtein distance is that it treats changing O to K the same as changing O to 0, it's more about number of operations distance than visual similarity
That'd be interesting. We also have a few related issues/things:
A nym change log would help with (1), and it'd give useful metadata for displaying (2) in satistics.
The main disadvantage would be that some folks may begin assuming a lower threat profile then change it for privacy reasons. Tricky.