My 2 rappen/centimes:

 >Second (or higher) level relay _is_ a false positive.

No it's not - positive is positive.  You provide relaying or you 
don't.  Are you or are you not responsible for maintaining some standard of 
net ethics?

 >My ISP has
 >been listed recently because they're doing a smarthost for clueless
 >companies with dial-up connectivity (and no relay checks). What
 >should the poor ISP do?
 >
 >1. Tell the customers to go f*ck themselves and cut their service.

No - advise them of their problem, and suspend mail service until they have 
fixed their faulty servers.

Most ISPs have contracts with their network customers explicity forbidding 
spamming of any kind.  Are you going to ignore your customer's violation of 
the contract?  By allowing customers to run insecure relays and blindly 
forwarding spam, the ISP is probably violating his own contract with his 
upstream service provider...

regards,
Will
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  "I was going to be a Neo-Deconstructivist, but Mom wouldn't let me..."

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