I would suggest looking at what’s been done before in the email spam world.

SpamHaus, for example, collates IP addresses and puts those in a list — but then periodically “crunches the numbers” to map IP to ASN, and therefore figure out the top N spam-emitting ASNs worldwide. it’s then possible to map ASN to network name. reverse DNS can help here too, of course.

In other words, there’s *both* an IP blocklist, and an informational, “these are the world’s spammiest networks” page for PR and public pressure.

BTW, there’s a lot of best-practice guidelines from the email spam world, and we can definitely give advice where it may be useful
I’m the original author of SpamAssassin, and we’ve just started a mailing list for blogspam discussion there — mail blogspam-subscribe /at/ spamassassin.apache.org to subscribe, if you like!

I dont know about the blogging engine you use but I’ve found in mine a flag that checks the referrer for the actual link to me -if theres no link - theres no entry in the referral log.

also - it seems that the user agent of this attack is unique - if you can look at the user agents in your web stats - look for

MSIE 6\.0; Windows NT 5\.2; \.NET CLR 1\.1\.4322\

meaning an agent running on windows server 2003 - using the latest dot net updates
(or using the latest .net code in a script) - very odd to see someone hitting your site with a server OS—– very very odd to see servers leading your stats. - I’ve tracked it down to 4033 hits in the last couple months on mine - and the traffic pattern and usage all tell me the spammers are using a bot on this platform.

As of Today I’ve banned that User Agent in my htaccess file - Since booting that user agent and checking if the site actually links to me - I have gotten zero logs in my referrer stats from abusive morons.

I think maybe rather than a list of abusers - you might want to think pro-active and just interrupt their google ranks by disallowing their attack.

After all it all comes down to google right ?