I actually doubt that phones are the major reason for a post like this. There are many reasons that you could fill in that only happen to some schools but phones happen to be the only one that applies to nearly every school. For example, at my school, our lunches have been cut down to shit 15 minutes at most, and if you buy lunch, it's much less. We usually have them call 5 minutes left. Sometimes they will say the kitchen is closed, sometimes they can't because people are still ordering.