We're obviously in the minority, but I think the EFF's John Gilmore has cut to the chase:
For Gilmore, spam blocking should occur at the recipient level, not at the level of self-appointed upstream censors.
"I noticed years ago that the community tends to go 'mob' and lose its morals and principles when it comes to spam," Gilmore says. "Free speech, interoperability, inclusiveness, tolerance, privacy, anonymity -- all go out the window when they get in the way of killing off those damn spammers."
I wonder if he'll get added to spam lists now, like I do every time I post a story critical of anti-spam activists. Yeah, subscribe me and Rob to more mailing lists under the handle "Spamlover." That's real mature.