Spam Control Considered Harmful

How about a new RFC outlining a method of dynamically delivering a relay
host native to whatever service provider you dial in to ?? That way, any
e-mail can be traced to a supposedly responsible end-user by the
victimized ISP ??

Better: The user to specifies "smtp" or "mail" as their mail
server and picks up the apropriate search domain from the local ISP.
Works for NNTP too!