Unicode domains are a security liability
Several commenters say DNS should be ASCII-only or that Unicode is too complex to be secure, citing homograph phishing risks; one blocks all punycode domains at his own resolver.
Links broke everywhere
HN mangled the URL and Firefox and Chrome refused to open it, likely due to normalization quirks and homograph defenses.
Registration war stories and Unicode trivia
People shared tales of sneaking π, emoji and one-letter domains past registrars, plus notes on compatibility normalization, zero-width spaces and an updated list of TLD-mapping characters.