Hilarious over reaction.
So a guy tailgated you, undertook you, called you a ****er and youve called the police and posted his details on a forum?
I see worse happen daily.
Then you call the guy "graham norton" for not looking at you at the lights? Did you want him to get out and fight you?
You weren't exactly brave yourself. If someone done that to me I wouldn't be pleased, and I'd let them know at that time. You say you will if you see him again, so why not at the time?
Instead you go home, post his details on a forum, call the police and say "if I see him again......."
IMO that's as pathetic as his behaviour, if not worse.