While testing some stuff in SI with npc alignments, i noticed something strange. WHen you have npcs nearby who are "good" aligned, and other npcs who are "Evil" aligned attacking you in groups, the "good" npcs turn on you when an "evil" npc yells "Get by me!"/Cover me!" etc. The party will slaughter both the evil npcs and the good npcs who appear to be trying to help the evil ones.