I’m open to the possibility that it’s just me being more aware/sensitive to how people are driving around me too. And I’m not necessarily talking about drivers I have to interact with myself but just seeing what people are doing in general.
The last time I was rear-ended, I was in stop-and-go traffic going uphill. Every time I moved a few feet and stopped, the car behind me would pull right up to within a few inches of my bumper. It was driving me crazy.
Sure enough, the person behind him hit him, then he hit me.
The rule from the book when I was teaching my kids to drive was: You're supposed to stop when you can still see the where the rear wheels of the car in front of you touch the street. If your good obstructs the view, you're too close. If you can see street between your car and their tires, you're too far.