"Free classified ads receiving a sufficient number of qualified negative flags are subject to automated removal.

Forums postings and paid classified ads receiving a sufficient number of qualified negative flags are subject to further review."

Who knows what the actual number is to flag an ad. I've read on other forums that various cities have different thresh holds. I think it is safe to say it takes more than one person though.




Source: http://www.craigslist.org/about/help...ity_moderation