The GreaseMonkey script I wrote works with Craigslist.org. Craigslist is a popular free classifieds site. Craigslist’s posts are not moderated, so anyone can post an ad. That includes spammers. Craigslist spam is mostly controlled by craigslist users themselves. See an ad thats spam? Click the spam button. If enough people mark it as such, it automatically gets taken down. I really like CL, so I do my part by flagging any spam I see. To do this you must click on the item title from the list, then click the spam button on the detailed listing. But I can often identify spam just from the title. Posts like “FREE 4gb ipod nano!!” and “Take Your New Pair of Uggs!” are obvious spam.
So my script adds the flag-as-spam buttons to the listing page, so you don’t have to click onto the detail page of each item to flag it.
You can get my script from userscripts.org, an archive of GreaseMonkey scripts. Here is what it looks like: