The hascash idea is OK, and obviously will work (as of now...the dividing line between human and machine is clearly not static, and smarter spam operations will start doing some segmentation analysis and then find it worthwhile to pay up). But the kind of person that may have legitimate need of a remailer may not understand and/or trust what would probably be necessary to use hashcash. And OK "that's their tough luck", but then I always feel there's safety in numbers.
Since you already have to use a special client to inject email to the remailer network, they would have no need to understand hashcash. It would just happen.
-- http://www.apache-ssl.org/ben.html http://www.thebunker.net/
"There is no limit to what a man can do or how far he can go if he doesn't mind who gets the credit." - Robert Woodruff
