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What happens when a school bans smartphones? A complete transformation | US education | The Guardian
(www.theguardian.com)
This is a most excellent place for technology news and articles.
Smartphones give access to information. Lock a kid in a classroom or a detention hall and without that phone they're isolated.
They're also isolated from family and people who might help them if they're being wrongfully detained.
A car is large heavy machinery. Even adults in cars are dangerous. It's a lot harder to cause destruction or accidentally kill someone with a smartphone. And it's a lot easier to make someone disappear when they don't have a working smartphone. Not a close comparison.