I recently re-watched "Way of the Warrior" and noticed a couple things I thought were just stupid:
Sisko and Kira taking the elevator to the Defiant when Kasidy sends her distress call. Not only do they not beam over, Sisko basically tells Dax they'll wait for her. Hello, emergency!
Even worse though was the race back to DS9 later, when the Defiant docks at the station before the big battle with the Klingons. The Defiant isn't some pissant ship with no weapons; it's a damn battleship! Why isn't it out there fighting too, defending the station?