Here’s an advertisement that does the job well without using graphic images nor a lot of preaching. Instead, it simply shows what could be lost if drunk driving does its worst. Not what the driver losers, but what his best friend loses. Watch.
https://www.youtube.com/watch?feature=player_embedded&v=eubWYPhcEEo
Budweiser has a history of making great commercials starring dogs. They’re most associated with horses, of course, but when they combined them for a Super Bowl XLVIII ad, it was one of the greatest commercials of all time.
https://www.youtube.com/watch?v=uQB7QRyF4p4