Also, I have mail from Mr. Jason Zions (jazz@hal.com) also complaining that I violated Mr. Metzger's privacy in revealing his mailbomb to me to the list as a whole. This strange code of cypherpunk chivalry I am not familar with.

It's not chivalry; it's copyright law. The creator of a message owns the copyright to that intellectual property; the recipient owns the copy of the message, much like one who buys a recorded album owns the copy of the work. The message you quoted contained the statement "Do not forward/reproduce this message" or words to that effect. That is a clear statement by the copyright holder which limits any redistribution rights that might have otherwise become yours upon receipt of the message. Given the nature of the communication (i.e. mention of potential email bombing), I believe you'd be within your rights to share the threatening content of the message with upstream mail host admins who might play a role in preventing such an occurance; but no further. It's also common courtesy. You can have significant disagreements with a person, yet still honor their simple requests. Jason