Hey, hey, if that nonsense would appear in my XMPP client I'd really feel the urge do to the same. But aren't we're talking about modern popular messaging apps here?

If those only'd be international, I'd seriously propose key fingerprints based on animated meme-filled "gifs". Because that's what the common audience understands (or at least my impression is so). Not some weird-looking strings of meaningless digits and letters.