The one thing I always disliked about the episode The Galileo Seven, was the fact that everyone seemed to forget their phasers had a Stun setting. The choice was always presented as using the weapons to kill the native inhabitants, or fire near them to frighten them off. Now for the dramatic purposes of the story I understand why this Amnesia occurred, but it's one thing that I always disliked about Trek in that certain elements would be conveniently forgotten for dramatic purposes. And that's because if they did manage to focus fire their phasers had a few individuals of that species and stunned them oh, the others might be frightened into leaving them alone because it appeared their comrades were in fact dead. But of course once the shuttle lifted off, the stunned beings would course regain consciousness and everything would be fine; but that type of situation would have made for a very boring 55 minutes.