https://www.polygon.com/red-dead-online-guide/2018/11/27/18115026/rdr2-parley-feud-griefing

Red Dead Online invites dozens of heavily armed cowboys to share the same multiplayer space. But what happens when someone used to a life of crime in the story mode of Red Dead Redemption 2 ambles into a crowd of unsuspecting do-gooders who are just trying to get along? Rockstar Games has baked a clever system into its new online experience to slow down griefers, one that relies on timed “Parleys” and opt-in, competitive “Feuds.”

I stumbled onto the system of Parleys and Feuds when a man rode into me, nearly killing my horse. He was thrown clear of the tangle of limbs and was on his way back to check on his own mount when I shot him dead.