"For the love of God" is a powerful phrase, especially when used in the right context. One such powerful story was The Cask of Amontillado by Edgar Allan Poe. In this story, the main character Montressor chains up his enemy in a catacomb and seals the tomb; when Fortunato, the enemy in question, realizes what has happened, he calls out, "FOR THE LOVE OF GOD, MONTRESSOR!" as our vengeful protagonist walks out.
The funny thing is, I didn't get the story because it's mainly dialogue, at least towards the end. We can only infer Fortunato's reaction from the last few lines. I only get it now because I've analyzed short stories for English papers.
The other great part about this story: if they still had catacombs, this would be a pretty good "no acting while under the influence" tale: don't drink offered wine because you might be led to your own doom. That would appeal to high-schoolers more.