One year ago this month, Peter N. Kirstein, a professor at Saint Xavier University on the South Side, stirred a tempest with his e-mail reply to an Air Force cadet who wanted to organize a political forum on campus. The gory details are readily available on the Internet, so I won't rehash them here. Suffice it to say it's not a very good idea anymore to say the Air Force is cowardly and kills babies. The professor and the cadet smoothed things over, and the incident has receded into the past. One phenomenon that has not receded into the past,...