I don't think there's anything wrong with using 'shock tactics' [=actions, images, stories, etc., that surprise and upset people] to discourage people from driving while drunk.
We 'were shocked into' silence by what we saw. [=we were so surprised and upset by what we saw that we could not say anything]
He got the 'shock of his life' [=he was very unpleasantly surprised] when he saw his own name on the list.
(..) did you just fucking say? Why do you think he never gets busted? Costello's a protected FBI informant. He'll trade you out. I thought I was supposed to go into shock. I'm not in shock. It fucking hurts! It fucking hurts! Hey. It's me. - What are you doing here? - Come here. (..)2006 The Departed