stop the twitterspammers from intruding on my twitter experience

please stop the twiter spammers. several times a day, i receive notifications from twitter that a new user is following me, and of the last 25 notifications, they have all been spammers, such as this one: http://twitter.com/raketherake

please put an end to these kinds of twitter abusers. their intrusion is ruining my twitter experience.