Here in Montana, way back when it was the real Wild West, gangs of people known as vigilantes rose up to combat what was seen as tyranny on the part of corrupt local leaders. They'd often carve or write, "3-7-77" into the home of someone they didn't like. Nobody knows what the numbers truly stood for, but it served as a warning to the occupant that they had 24 hours to get out of town or else a lynching mob would hang them. In one of our bigger ghost towns (either Phillipsburg or Virginia City, can't recall which) you can still go see a noose they used, hanging off a rafter in a building.
Nowadays we of course outlaw actual vigilante activity, because it was rather cruel and wrong, but the vigilante spirit of never giving in to an overbearing or unjust authority is a huge part of the Montana identity. We celebrate Vigilante Day every year with parades and generally having a good time, the highway patrol uses the number as their logo, and I personally am hoping we one way make a gold 3-7-77 on a blue field the state flag.
Probably a lot more than you wanted to hear, but I'm a history nut.