I wish all websites would only allow ascii characters as usernames. Having the full spectrum of Unicode available has brought nothing good.
— https://www.kalzumeus.com/2010/06/17/falsehoods-programmers-...
Yeah good idea, I'll tell my grandmother it's her fault if "bank.tld" with "CYRILLIC SMALL LETTER A" instead of latin "a", and with a valid HTTPS cert, stole her banking credentials. What an idiot!