A young (presumably) woman wrote you confessing that she leaves a whole car length in front of her as she drives the Los Angeles freeways. This is so she can "stop my car without hitting the car in front of me." I think I have seen her on the freeway.
I would have preferred to think she was joking, but I know she was deadly serious. She should know that she should leave one car length for each 10 m.p.h. she is traveling--probably six or seven car lengths in her case. At 60 m.p.h., her car travels one car length in about two-tenths of a second, about the time required for a quick blink.
I would suggest she be less concerned about smashing the license plate of some one ahead into their brain, and concern herself more about getting that license plate in her mouth.