Tailgaters often learn their lesson when the car in front changes lanes or swerves to miss something they see in the road ahead, but by then the tailgater doesn't have time to react and hits whatever it is. Also, lots of deer and "at large" dogs down here decide to cross the road at an unfortunate time. The lead vehicle
brakes to avoid, the tailgater rear-ends them. The tailgater is at fault for not keeping a safe distance. And it's pretty ugly what a box hitch bolted to the rear frame of a heavy-duty, high-stance 3/4 ton pickup can do to the grill and hood of a low-profile sports car. I've been rear-ended twice in my Ford F250, both times by teen-aged girls talking on their cell phones.
Light turns red, I stop, they don't. One wasn't even tailgating - had plenty of time and distance to stop and just didn't! Luckily, no one hurt either time. But the vehicle doing the rear-ending in that match-up definitely gets the worst end of it.