There's much better arguments for/against crypto than appeals to authority. Consequently, you then cited an appeal to majority to defend your appeal to authority
Granted, the crypto debate on HN is pretty well hashed & Guido's tweet doesn't add anything to the discussion besides making clear where he stands on the issue
I don't care about logical fallacies in this case because the world doesn't work in a purely logical way. If programming was purely logical, it wouldn't be so fad-driven, for instance. And reputation ends up being one of the best ways to filter out useless noise in basically every useful discovery system we programmers have come up with.