Of course, people are now getting so annoyed, there's a movement to Google bomb the SORBS web site using the text "worthless project". I, of course, would never aid in such an endeavour, despite SORBS indiscriminantly blocking whole ISPs and assisting the spam itself (which apparently now makes up about 80% of all email sent) in rendering the email medium useless. Although SORBS is now at 3rd position for "worthless project" on Google. Heh.
SORBS is basically the spam-fighting equivalent of hanging all your suspects just to make sure you get the criminal.