Can this be implemented in schools to curb use of digital devices (which in my opinion should be completely banned in every academic environment from kindergarten through university)?
At the university I go to, a laptop is essentially a requirement for a lot of classes.
The issue is not the devices, it's how they're used. Besides, at least in my experience, trying to ban websites, devices, etc in schools doesn't actually work and just leads to kids getting around it, and continuing to do what they were doing before.
The internet censorship in particular got to be pretty absurd at my highschool, I remember not being able to register Native Instruments hardware in my engineering class because their site was blocked for 'having a toolbar'... And yet those of us that wanted free roam on the internet brought smartphones or used ultrasurf etc, but even the teacher couldn't access the registration site without us bypassing the filters while he looked the other way.
Devices are tools. You shouldn't ban tools. You should teach people how to use them effectively.
Plus, it's way faster (and tidier) to take notes in a laptop rather than pen+paper.
Also, I've had a few students with disabilities who could not use pen and paper, but could write with special keyboards. And blind ones. Maybe we should tell them to stay out as well.