aristotle - 6:28 pm on Jun 16, 2011 (gmt 0)

I agree that the Google algorithm can probably detect and negate a barrage of Blocks that result from an organized attack on a website.

But that still leaves the problem of the possible rankings bias introduced by ordinary random visitors. If a website promotes a minority view on an issue, then it will tend to get more Blocks and fewer +1s than a site that expresses a majority view. As a result, sites that promote minority views will be unfairly demoted in the rankings. In effect, Google will be suppressing minority views.