I think what the OP is saying is that there's no right, stated or implied, to wrap Craigslist data in your own UI. If you want to write your own front end for classified ads, you're going to have to bring your own ads to the table as well.
The story would not have been as sympathetic to Mr. DeMenthon if he was hosting a site called, WhereToSetUpMethLabs.com.