Late to the party on this one but there are not enough foul words in the dictionary to express my contempt for people who use black-hat techniques to boost their ratings. Nothing annoys me more than finding the first page of search results populated by nothing but link spam and data aggregators with virtually no useful content. Things like FixYa and Yahoo Answers are especially annoying - the blind leading the blind screw up valid data to the point where it takes three times more digging than necessary to ascertain that one's search results have any meaning.
Common failure of the information superhighway - or rather, of the people using it. Just because you read it on the internet, doesn't make it true, even if it's at the top of the search results. (I consider the top of a search list to have, by virtue of its position, the credibility of the MSM...which still isn't much.)