On the heels of adding a "Report as spam" button to twitter.com (http://blog.twitter.com/2009/10/help-us-nail-spammers.html), you can now also simultaneously block and report a user as a spammer via the API.
The documentation for the report_spam resource can be found here: http://apiwiki.twitter.com/Twitter-REST-API-Method%3A-report_spam As the original announcement mentions, it's important to realize no automated action will be taken as a result of a spam report being created. So don't expect an account to be suspended immediately (or at all). Also you can only create one spam report for a given user, so subsequent requests will have no result. Thanks. -- Marcel Molina Twitter Platform Team http://twitter.com/noradio