Contagion theory states that crowds cause people to act in a certain way http://en.wikipedia.org/wiki/Crowd_psychology

Contextual cueing (also referred to as “Contextual Cuing”) is a concept in psychology that refers to the manner in which the human brain gathers information from visual elements and their surroundings. The term was coined by Drs. Marvin Chun and Yuhong Jiang of Yale University, and was originally published in June 1998. Contextual cueing is defined as an...

One who is protected or trained or whose career is furthered by a person of experience, prominence, or influence. Merriam-Webster