Oct 14, 2009
Hate Twitter spam? Now you can report it with one click
Filed under: Social Software , Microblogging The head honchos at Twitter have decided to take action against the site’s growing problem with spam accounts by giving users some new options to file spam reports . You’ll see a new “Report as spam” link on the sidebar of each user’s Twitter page, and a “Report as spam” action available from your followers and following lists.

The rest is here:
Hate Twitter spam? Now you can report it with one click