Yesterday my blog reached 10.000 spam-comments for this year…. Spammers are looking for blogs that do not have any kind of spam protection or are weak and have let some spam links through. They then monitor those blogs for activity to see if they are being used/check often. If they find that the blog is uninhabited, they then start adding links pointing to those spammed posts in their new spam comments to be sent to unsuspecting bloggers. Thus by making the links to blogs in their spam comments look somewhat eligible (and in a foreign language) the spammers are raising the pagerank of those spammed posts in “compromised” blogs and effectively giving their own spam links the attention they need.
Luckily there is a kind of software that protect a blog like mine extraordinary well for spam-comments. They call it Akismet. When a new comment, trackback, or pingback comes to my blog it is submitted to the Akismet web service which runs hundreds of tests on the comment and returns a thumbs up or thumbs down. When the plugin catches something as spam it saves it in the database for 15 days in case you want to check it out manually and then automattically deletes it. In the unlikely event something gets incorrectly identified as spam you can correct it and it submits the “false positive” back to Akismet for analysis and improvement of our system. If a spam comment happens to get through and you mark it as spam within WordPress (Wordpres is the engine behind this blog), it does the same thing. Akismet becomes more effective the more you use it.