"Outernet marketing conduit" BL Ochman called the proposal "ridiculous". And it's caused a bit of wailing and gnashing of teeth from others in PR. Jeremy Zawodny's proposal to create a blacklist of flacks who effectively spam bloggers has certainly raised the temperature beyond Tim Bray's death to PR post from last week.
At the risk of repeating some bits from an earlier post, my advice to Zawodny and other people planning on an email blacklist of PRs (other than possibly reporting them under the CAN-SPAM legislation) is that you can go ahead and block them but the chances are they will simply start ringing to see if you got their pitch. And you really, really don't want that.