Does craigslist actually own the copyrights to user generate text and images?
Padmapper does link to images, but Padmapper would be useless if it didn't also re-publish the content jacked from Craigslist.
That was my main point; it's fairly useless for non-attorneys to argue legal cases on HN (my apologies if you're a lawyer and I'm just wasting your time).
AFAICT, Padmapper is doing something very much in line with what journalists and search engines have traditionally done. That point of view may not prevail in court, but I think it's completely defensible on ethical grounds.