How about a website like this http://www.platewire.com/ where you can post the plate numbers of aggressive drivers. I had the same experience one day when a driver expected me to move over but I couldn't as there was a lorry to my right so he swerved around me just missing my car, I flashed him because of his dangerous driving so he got annoyed and showed me the middle finger.
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May your dreams take you travelling all through your life.