I know a lot of people who, when driving their cars, get obsessed with tailgaters and spend more time looking in their rear view mirror and speedometer than looking at the road ahead of them.

Personally, I ignore tailgaters and just maintain a safe distance from the car in front of me. If there isn't one, which is often the case with tailgaters on two-lane roads, I punch the cruise control at 2 mph under the speed limit and ignore the rear view mirror. Why stress?