Signal

I'm certain that nearly all of these vehicles on the road have turn signals. Are their drivers just completely oblivious to their purpose? Seeing people drifting unannounced from lane to lane on the highway is mildly irksome, but frequently having to dodge them as they fail to signal and then try to merge into my car at 80mph is fucking annoying. Same with people that turn at intersections without signaling.

You literally only have to move your pinkie finger an inch. Why is that too much trouble for you?