Will Google penalize sites which only link using the nofollow attribute?

NoFollow links to other websites

As many webmasters are linking only in nofollow killing the natural way of links do you think Google will penalize people who only link out with nofollow attribute in the future?

In fact only a small percentage of links across the web are nofollow. There is, however, no penalty for using nofollow.

NoFollow was introduced in 2006

Matt Cutts GoogleWebmasterHelp March 2011

Editor Comment – David Viniker

Several Social Media websites including Facebook and YouTube and many blogs tend to place a nofollow attribute on backlinks – links placed by webmasters to their own websites. This prevents people abusing the system by placing links totally for their own advantage.