Earlier quoted context omitted.
No it's a non-issue, and by the way Google probably uses much more that 57 'inputs' (signals) to determine relevance. Personalization is just a different term for relevant results and this is just FUD, the source of which is people who don't understand the technical aspects.
I'm gonna humbly disagree. There are many potential ranking factors in a search result: how well the query matches the document text, how important that text is in the document, how important the document is (PR) and so on. What I don't necessarily want is further ordering by what a machine thinks is my political inclination or world view.
edit: speaking of bubbles :D