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In reply to the discussion: Egypt closes schools in Sinai towns as area inches toward open war [View all]happyslug
(14,779 posts)Known as the "Freedom Riders".   All they wanted to undo with violence the proper order of the South.   They REFUSED To obey local laws, saying such laws violated the US Constitution.  
http://en.wikipedia.org/wiki/Freedom_Riders
A man by the name of Martin Luther King had a program of internal security, in that when he was leading Riots and other protests against the laws of the South, they "policed" other members of the group so that no one violated his call for what he called "non-violence".  
Yes, the Southern Civil Rights Movement "Policed" themselves in the form of having people just to the rear of the protesters to remove anyone who went beyond what had been agreed on.  This was easy for those Southern Segregationist police were so anti-American that they had no African Americans they could use to infiltrate the Civil Rights Marches.  Those African Americans they could recruit to be provocateurs where easily located and isolated by the people within the Civil Rights movement that had been given the power to police the ranks of the protesters ("Trials" were held, where the person charged were told not to remain.  These would be quick decisions, but held all the effect of a trial, someone was charged, could plead his side, but the decision was up to someone else.  
I suspect the same thing is happening within ISIS, they is a set up to determine who is to be killed.  In some cases the person may even be given a chance to plead his case before he is executed.   Those are still "Trials", prejudicial but still a Trial. Not up to US standards as to a trial but still a Trial.