I don't understand how people aren't differentiating between bringing a phone with you into class and actually using it on class. I find it absolutely ridiculo

I don't understand how people aren't differentiating between bringing a phone with you into class and actually using it on class. I find it absolutely ridiculous that anybody would even suggest that kids shouldn't be allowed to have a phone at school. Equally, I don't understand how having a phone at school is a problem during class. Of course you aren't allowed to use your phone during class unless given explicit permission. If you do it your phone gets confiscated. You get it back after class. If it happens too often your behavior grade gets marked down. And if a kid uses a phone during a test then that's just cheating and they get an F.