Since they cannot claim copyright to the facts in the ads, they’re trying to claim copyright to the ads as a whole. Neither post[^ff] seems to go into a real analysis of what creativity actually goes into to the ad or whether Craigslist might have an issue with a de minimis argument.[^note]
[^ff]: *See also,* [Ars Technica](http://feeds.arstechnica.com/~r/arstechnica/index/~3/sVLkQfJDbSU/)
[^note]: *Note to self: I should write that post.*