Worth considering. Definitely. No matter how practical Google is, it's a potential problem waiting to happen. Of course, any other search engine with a quasi-monopoly would be the same. A search engine in particular is a very convenient place where a lot concentrates and where a lot can be learned about the behavior of surfers. And Google's somewhat strange approach and collection practices are certainly to be viewed critically.
At Der Schockwellenreiter there's the original article.