These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Idiot Plot: "Menace from Space". If you're in the process of launching a space shuttle, and you know that terrorists have already infiltrated the airbase and are trying to board the shuttle at that very moment, you stop the countdown and abort the launch. You do not allow the shuttle to take off with the terrorists aboard so they can use it as a platform for their Wave Motion Gun.
The Scrappy: Too Much is as clear an example of this trope as you're likely to find.