What a silly analogy. If I have a car and you steal it from me, you now have a car and I don't. What PadMapper does is it takes a picture of my car and shows/sells it to people. Analogies require handling with care :-)
What's more is that you are arguing against the notion that whoever creates the content (or own's the content) has the right to decide what gets done with that content. And no matter how much you dislike what they are doing with their content (ie. not creating a shiny interface to access said content), that does NOT give you the right to use that content without permission. It is my understanding that craigslist often gives out permissions to use it's content, and it would appear as though this company didn't bother to secure that permission.
This is without the permission of Craigslist or of the original submitter or the content.