"There is nothing worse than driving along on a summers day with your window open only to be greeted by the second hand foul smoke coming from the inconsiderate driver in front"Perhaps an addition to the highway code is required. Something like 'while driving on a road paid for by your taxes, it's the height of rudeness to smoke in your own car if there is another vehicle following you'.
I think I can now truly say that I've heard it all.
