On one hand it is school policy that he was not to speak on the phone during school hours, on the other hand, the school should not have been so dickish when they were informed of the sircumstanses behind the call. A circumstance like that should be understood, and allowances should be made. It's not like the kid was talking to his mom all day or something.
I think they should send those teachers to Iraq for the remaining duration of the war, just get their mind off of the incredible stress of high school politics!