It's Better in Wyoming.

Also from George Black, in Empire of Shadows : There are times when people push, or are pushed, too far, and things begin to fall apart.  A new line is drawn on a map.  One man steals a horse; another takes one drink of whiskey too many.  An insult is magnified, and the reprisals escalate.  Personal grudges bleed into larger political grievances.  Prejudice breeds fear, and fear feeds prejudice.  Demagogues sieze hold of these unstable moments.  Moderate men chafe at the absence of order and find themselves invoking extreme remedies that end in outbursts of collective madness. (Ch. 15)

"Historian Richard Slotkin says that while the intended mission of the vigilante may be civilizing and socially constructive, his methods assume a 'privilege of violence' beyond the law.  Terror breeds counterterror."  - George Black, in Empire of Shadows