I think I would have taken a piece of the remaining fishing line, tied a short little hangman's noose in it, attached a note to it that said "I have your plate numbers, but you don't have mine". Then, attached the noose and note to his driver's side rear view mirror.

I agree with all that disportionate retaliation that damages property is just not setting a good example, and simply makes you subject to criminal actions and even the possibility of liability.