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.
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.