Not exactly an answer but I thought you might be interested in this:
In the school I used to teach at, the head teacher convened an emergency staff meeting during the morning registration period. Around 600 teenagers had to be left in their classrooms, unsupervised, because the boss regarded the meeting as so important. Once we were all in the staff room, he launched into a ferocious attack upon his staff, berating us all for a total lack of professionalism. This was because he was convinced that we were all using the school phones for personal business. (Hardly anyone ever did). He made it clear that the final straw had arrived when he'd opened the phone bill to see that someone had made an international call from the school. He got more and more animated, and turned a deeper and deeper shade of purple, as he forcefully expressed his thoughts about whoever it was who'd made that call. It was several minutes before anyone else could speak. Eventually, someone said, "Er, excuse me headmaster, but didn't you phone the new French assistant to check the date that he'd be arriving?". The look on the head's face was a joy to see ;-)
Chris