This seemed a little misleading to me, although I still don't agree with them doing that.
IN reading the story here >>>
http://www.bowmansbrigade.com/google1.htm it appears this relates to accepting advertising, not in how they display results when looking for something as a search term.
Still wrong but its not like they are filtering your search based on their views which is how it sounded at first. I signed the petition just the same.