I remember being greatly annoyed at a version of Google Hangouts that would pop up a message about certain phone numbers being too long whenever I opened SMSs from them, and then flat-out refuse to let me reply to them.
In South Africa, we have a lot of SMS services that tack five or so digits onto the ends of normal numbers as unique identifiers, so what I assume was a programmer's false belief about phone numbers did some real harm there.
In South Africa, we have a lot of SMS services that tack five or so digits onto the ends of normal numbers as unique identifiers, so what I assume was a programmer's false belief about phone numbers did some real harm there.