Some related posts from Technorati and Google.

 [Dennis Forbes - Pragmatic Software Development] 4-Digit UID Slashdot Account - Free To Good... : One of only 10,000 such accounts, most have been lost in time by negligent keepers (many were setup when Slashdot was a fringe site, so people forgot about them). Featuring such luxuries as excellent karma, dozens upon dozens of friends, and a posting history of hundreds

[ One Fine Jay] Desperate preventative measures: Each of those colored URIs either do not resolve to any webpage on my browser, or lead to placeholder pages or marketing pages. This is either innocuous “referral spam,”

[Floggin.us] floggin » Referrer Karma - A Referral Spam Prevention Tool » Blog ...: If the first test fails then it checks a large list of known referral spamming IPs and URLs they use to spam, if it is matched on that list then they are shown a 403 Forbidden error and given an opportunity to click a link to access the site if they were banned accidentally by the script. This is something no automated tool will do.

[Bloggingpro.com] Referral Karma by Blogging Pro: I switched back on Referral Karma and added the WordPress Dashboard to the whitelist. If anyone has a problem please let me know.

 [Unknowngenius.com] Dr Dave » Referrer Karma: anti-comment-spam plugin Spam Karma to block spambots before they even reach your comment page (note that you do not need to be running either SK or WP in order to use RK: this feature is entirely optional).

 [Ashleyit.com] brentashley » Blog Archive » Referral Spam: lists on their main page, and the spammers love to get into those as well. It also should be realized that spammers don’t pay much for these things, it costs them almost nothing, so they have no problem making life hell for others if there’s even a few pennies in it for them.

Reflected tags on Technorati: Blog, Referral Spam, Targeting Spam