(As an aside: how do these gateways take the heat? Should I suggest to those complaining to me that my system is intended for email, not usenet, anonymity, and that they should direct their complaints to the mail-to-news gateways which are the "real" cause of the problem? Is this tactic likely to be politically effective?)
No, and it would probably backfire. If the mail-to-usenet gateways get abused, the administrators of the gates will probably start blocking incoming mail, as CMU and Berkeley have done. (The CMU gateway is outnews+netnews.group.name@andrew.cmu.edu You can try it and see what results you get.) It might be more effective if you bounced messages from detweiler back to him, CC: postmaster with a notice saying "Due to repeated abuses of this email service, messages from detweile@cs.colostate.edu are no longed accepted. Unsent message follows: