You didn't add anything new to the discussion. I understand that sometimes bureaucracies-- like the public school system-- can implement poorly thought out policies, but again, I assure you that there will be a way to pick up that hypothetical kid without an app or smart phone. Because, again, the alternative is that the kid doesn't get picked up and... what? Stays at the school?

There will be a backup method. The guy I initially responded to probably just did like most of us would do and installed the app without question.