There is plenty of precident for Craigslist not being legally responsible for this stuff (thank God). The laws could change, of course, what with the constitution being a living document and all, but so far, when someone posts or says something inflamatory, they and they alone are responsible. If it causes damages, it is up to law enforcement to find the responsible party, not just jail the company that made the getaway car.
Craigslist has NO legal responsibility here, nor should they. It ALL falls on the shoulders of the person who ran the ad and the people who actually took stuff. It may be a hard case to solve, but that is why we have police and neighborhood watch groups.
Guess we disagree on that. That is like saying Orbitz has no responsibility for making sure the car rental firms on their site are valid companies.