Really?  I did four years in high school like most Americans, and the guidance counselor never once named names over the PA system.  No school official named names on the intercom except in the context of praise.<br/><br/>Even if they did do that, it's foul and nobody should approve of it when it happens.  It's too easy to send marginally more private messages, so exposing the student in question over the PA is ridiculous.  (And if you can find a modern school that does it, it is no less ridiculous!)