Even before getting to security issues, why would anyone prefer typing in emoji instead of numbers? I can imagine people struggling to find some random emoji from the keyboard before the notification banner disappears. (Normally I don&#x27;t switch back to the message ui but try my best to finish typing in the auth codes before the notification banner disappears, and even 6 digit codes are annoying because sometimes it disappears before I type them in. Most people will have probably only typed in one emoji before the notification banner goes away). This guy should build it himself and realize how out of touch this solution of his was instead of telling the users to build it and let him know. Personally if I ever came across any app that implemented this scheme, I would feel offended because it feels like the developer is trolling me.