Needed for a computer ethics class

Does anyone have a concise, citeable statement about why anonymous remailers are a good thing? Some sort of position statment by Julf would be ideal. Similarly, if anyone has something for the *other* side of the coin, I'd love to see that. I'm in the process of writing a course on computer ethics for the University of Colorado at Boulder and I think anonymous remailers would be a good subject for an essay assignment, but I need enough material (ideally, primary source material) to lay the groundwork first. Patrick