Okay, about your analogy.
There is person A, you know that the person will die tomorrow. Person B wants to kill person A today, and so do you. After all, he's going to die tomorrow, you can either kill him and get your revenge or stand by and let the other person kill him.
What I'm trying to say is that no matter what you did, no matter how long you whisper that person, somebody is going to rip him off. I would rather buy it myself and work out whether I want to keep it or give it back to the person later than see somebody else waltz off with whatever the guy was selling.
And I think I'll go to sleep now ... and your analogy scared me a little bit ^^;