It totally makes sense, but I don't buy for a second that parents would put up that. Yeah, it's school policy, but there would be some parent willing to take that to the supreme court if possible. The argument in favor of absolutely no cell phones at school (or no reception) would be that kids are texting too much, or texting inappropriate things to each other, and it's distracting from the learning process. But parents (like the rest of the nation) are more concerned with safety than anything else, especially if it's an abstract problem like that.

Calls used to go through the office, but if there is an emergency it's obviously ideal to be able to bypass that now that the capability exists. I work in a school and am not a parent, but I most definitely see the potential benefits of having a cell phone over the detriment of not even being able to have one, ever.