You know those scenes from the movie where two guys are in a bar and one taps the other on the chest firmly. It usually comes right before one of them takes a swing at the other.
http://www.washingtonpost.com/wp-dyn/content/article/2010/02/03/AR2010020304057.html
Watch for the fresh post coming soon titled “The Spy Who Nudged Me.” The above article from Thursday’s Washington Post is a good primer for the topic of cognitive infiltration of social media which will be one of the key topics of the new post.