Voting search results at Google in near future

In near future users can vote search results at Google: Users vote search results up or down - a down vote makes it dissapear with a “poof,” an up vote moves the result to the first page.
Google is also testing comments, with linked user names, and others can vote those comments up and down. In effect, this bucket test shows a Google that combines their search algorithm with every important feature of Digg.

Google was working nearly a year on these new features. For further information see "Is this the future search?" on Techchrunch.


This manipulation of search results leaves lots of thoughts:
Will this manipulation work out in negative way so that businesses manipulate their own sites' range? (Probably) If so, will it influence the search results more than other manipulation tools?

What is also worrying me: If you leave your footprints there by voting other can see your profile. - Another step to a surveillance society?