http://reviews411.wordpress.com/2008/05/12/craig...
If you have posted a Craigslist ad and it’s not showing up, even though the status is ‘published’, your ad has been “ghosted”.
Craigslist does this if its system labels you a spammer. This makes spammers think their ads have been posted but really they’re not. Most big-time spammers won’t take the time to actually look to see if their ad is listed.
I’ve seen several explanations for the algorithm used to determine someone is a spammer from the amount of html code used to the number of ad posted.
Now all of your ads are being ghosted. So how do you get your account out of this status? It’s not easy. There are a few things you need to do.