Inspired by @cordeliane
  1. Say goodbye at the end of a phone conversation.
    They're talking, get the answer they need to solve the mystery or whatever, and just hang up. They don't say "Thanks" or "Goodbye" or anything. Rude.
  2. Hunt for parking spaces at the club or restaurant.
    There's always abou three spaces open so they don't even have to do the fancy parallel parking thing. Just swing into the middle space and jump out of the car.
  3. Go to the bathroom (unless it's used for humor).
  4. Eat or drink.
    In the entire series of 24 starring Kiefer Southerland, there were zero scenes of anyone eating anything. In one scene he had a cup of coffee in his hand, but never took a drink.