vigilantism
Frankpledge, American frontier-vigilantism emerged as a "mutation" of the Saxon tradition of frankpledge Feud, a now-illegal form of non-governmental interpersonal violence practiced by feudal groups and currently by organized crime gangs Mobbing, the coming together of people for the purpose of bullying an individual Posse comitatus, indirect descendant of the Northern Germanic hird or fyrd system, the "citizen enforcer" band either capable of acting lawfully as exceptional agent of justice; or deteriorating into lawlessness of populist malice