I played on LegoPepper's medieval RPG a couple months ago, and I was confused by how weird and restrictive it was. If you know the rules of the server, it's impossible for any other player to actually kill you. If you say "I submit" at any point during an altercation, they can't kill you, regardless of whether you stole their money, raided their castle, or fisted their girlfriend. Kings can't execute criminals, knights can't lop off heads, etc. Not without the consent of the person getting killed.
I don't know how why running the server like an authoritarian pacifist hippie commune makes for a realistic medieval experience, but I guess it's their server to run the way they choose.