The first thing I thought about is a man in the middle attack with homoglyphs. I don't know if I'm paranoid, but look at this

    > keybase id maria
    
    pgp:     C4B3 15B4 7154 5281 5100 1C58 C2A5 977B 0022
    github:  mаria_leah   ✓ https://gist.github.com/23423
    twitter: mаria_h20    ✓ https://t.co/mаria_h20/523554
    site:    mаriah20.com ✓ https://mаriah20.com/X904F...

I looked up for 'maria', all ascii. The answer, served by a malicious server, contains the first 'a' of maria in Cyrillic (check yourself, you'll see that 'mаria_leah' != 'maria_leah'). This would fool the user.

Maybe the client should apply some logic as browsers do for IDN homograph attack to show characters not in your locale in a different way, or at least warn you.