Maybe, but it's more likely that they're simply toggling some mode in that private cell tower to allow certain connections through or not. The faraday cage com

Maybe, but it's more likely that they're simply toggling some mode in that private cell tower to allow certain connections through or not. The faraday cage comment was more about making sure people outside of the school aren't affected - you wouldn't want strangers walking by to be unable to connect to the internet. (Or hell, maybe they don't care?)