To remind them that they need to use their indicators, that they need to wait until the road is clear until they pull out, that they should not jump lanes into the path of another car without any indication that they are going to do so and that
their desire to get home is not more important than almost killing other people/wrecking someone else's car.
Two near misses in the space of 30 seconds with 4 DC in the car. I am fucking raging!