Blog noise achieves Google KO: The Register blames trackback for messing up Google search results. Their theory is that trackback pings generate empty pages with just enough keywords to pollute search results.
They point to this search as an example. Check the URLs of the results — trackback pages account for seven of the top ten results.
“The humble weblog has finally achieved dominance over Google, the world’s most-used search engine. Originally intended as a tool that allowed people to publish their personal diaries, weblog software has swiftly evolved, accreting several ‘innovations’ that have had catastrophic consequences for Google. If you’ve never heard of the ‘Trackback’, or ever wanted to know, then we have bad news: you’re about to become acquainted, whether you like it or not, dear Google user.”