On Sun, 2 Sep 2001 georgemw@speakeasy.net wrote:

If the remailer operators decided they wanted to deny "baddies" use of their services, they would not only have to unanimously agree as to who the "baddies" are, they would also have to deny their services in all cases where the client cannot be positovely identified. Neither of which strikes me as being plausible.

We do this (or some of us do.) When a spammer is detected, often his IP address or email address is added to a block list. It doesn't work all that well. We can't block people -- only electronic representations of them.