It seems to me that now that the FTC has the "CAN spam" responsibility it might be reasonable for a user, perhaps optionally as part of their profile, to add UCE[at]ftc.gov to the list of people notified that an E-mail is spam.
Also as part of the profile, one might want to see if there was any way to add one's representative to the list so that they might consider the amount of spam that their constituents are getting and that implementing a real DON'T spam system might be worth while.
--
Mike Liveright