Where the rule of law is seen as being absent, weak, or too oppressive to want, and crime of all kinds flourishes, sooner or later people will take the law into their own hands and become vigilantes. Here are seven such gangs.
I had me a dream once. Just after I *acquired* this here knife. Only the knife was a bit shinier and I was in an alley somewhere. I dunno, maybe it was Brie or Holsten, someplace like that. Anyways, I'm walking down this alley when I comes across some dumb bloke trying to shortcut his way to market. Like *my* alley is a god-d**ned thoroughfare for just anyone!
The PCs are stuck in a town with a strict peace policy, the tiniest scuffle can land you years in prison. The town also happens to be a tourist haven, so inn-prices have skyrocketed. The only way the PCs can rest is if they splurge on a room, with their enemy.