Craigslist has manually screened every adult services post since May 2009. In a blog post last month, they noted: "before being posted each individual ad is rev

Craigslist has manually screened every adult services post since May 2009. In a blog post last month, they noted: "before being posted each individual ad is reviewed by an attorney licensed to practice law in the US, trained to enforce craigslist’s posting guidelines, which are stricter than those typically used by yellow pages, newspapers, or any other company that we are aware of. More than 700,000 ads were rejected by those attorneys in the year following implementation of manual screening, for falling short of our guidelines." http://blog.craigslist.org/2010/08/manual-screening-matters/ http://blog.craigslist.org/2010/08/manual-screening-matters/ Craigslist also does other stuff, including phone verification for every adult services ad: http://blog.craigslist.org/2010/05/an-open-invitation-to-rachel-lloyd/ http://blog.craigslist.org/2010/05/an-open-invitation-to-rac... As Craigslist notes, this is a lot more screening than any other services does, including classifieds or the Yellow Pages.