Donuel writes: Self centered drivers are different from those who aggressively and deliberately tries to commit harm.

Bion of Borysthenes wrote: Boys throw stones at frogs in fun, but the frogs do not die in fun, but in earnest.

It would be good if people who had done an advanced driving course could have a small hexagonal (to distinguish it from the various 'L' plates) yellow plate on their bumper to show this. Insurance companies might (or perhaps do?) offer lower rates, and the plate would become a desirable boast.