Its not just cars. Fireworks now seem to to be obligatory accompanment to any kind of celebration eg. birthday, wedding, engagement, christening, funeral wake, party, celebrating award of latest ASBO, etc, etc.
We have a council estate nearby, populated by feckless chavs, who seem to delight in spending their dole money on fireworks, then letting them off in the small hours.
Why are fireworks sold all year round now? When I was a kid (1970s), we were there were public information films telling you to keep pets indoors on firework night so they wouldn't be frightened by the noise. There would be no point now, as fireworks start 2 weeks before Nov. 5th, and last for 2 weeks after.
Rant over.