True, but it doesn't really change the calculus at all. Good defensive driving includes considering the human factors, which also means anticipating when other

True, but it doesn't really change the calculus at all. Good defensive driving includes considering the human factors, which also means anticipating when other drivers don't drive well or suddenly decide to do something stupid. So yes, the person behind you that rear-ended you might be in the wrong, but you're still going to be left with a life-long spinal injury. As they say -- you can be dead right, but you're also dead.