My personal hero danah boyd has a post about the dangers of allowing predictive search terms to set the agenda:

You’re a 16-year-old Muslim kid in America. Say your name is Mohammad Abdullah. Your schoolmates are convinced that you’re a terrorist. They keep typing in Google queries likes “is Mohammad Abdullah a terrorist?” and “Mohammad Abdullah al Qaeda.” Google’s search engine learns. All of a sudden, auto-complete starts suggesting terms like “Al Qaeda” as the next term in relation to your name. You know that colleges are looking up your name and you’re afraid of the impression that they might get based on that auto-complete. You are already getting hostile comments in your hometown, a decidedly anti-Muslim environment. You know that you have nothing to do with Al Qaeda, but Google gives the impression that you do. And people are drawing that conclusion. You write to Google but nothing comes of it. What do you do?

Be sure to read the comments.