och·lo·pho·bi·a -- n. 

1.  The fear of mobs.
2.  The fear of gangs.

Lynching and Vigilantism in the United States by Norton H. Moses 

Beginning with the 1760s, when lynching and vigilantism came into existence in what is now the United States, this bibliography fills a void in the history of American collective violence. It covers over 4,200 works dealing with vigilante movements and lynchings, including books, articles, government documents, and unpublished theses and dissertations... (Read More)