The situation is about the same with ANY group of people with power over others...soldiers, police, judges, teachers, priests...whatever.
   Most are no doubt honest, dedicated and concerned...'some' are bad apples with prejudices and a warped sense of humor. The trick is to do the weeding process BEFORE they get into positions where they can cause major problems. In Iraq, someone needed to explicitly say "...and be advised, we will tolerate **NO** deviation from the code of military justice...here are the rules and limits- stick to them or face court-martial."