Blog Spamming!

For anyone who has not read through a PC World magazine, it can be accessed online, by simply registering. You will receive an email notice when for each new publishing. It offers the latest tech news, reviews, tools, devices and software tips, etc.

While reading through "Today @ PC World", I came across a posting by their staff about Blog Spam, whereby spammers insert a single link into your blogs source code which leads back to the spammers website. In this case, it had to do with porn sales. Has anyone heard anything about this occuring or had experience with it yet?