Entrana would be an obvious contender, as you cannot bring any weapons onto the island, although I think that the Monastery should be included, since you can kill the Monks/Priests. You can kill the animals on Entrana, too, so fighting is not totally disabled. Saradomin/the monks just tell you not to fight, so the Monastery could be a place of peace, too. But then again, the whole thing is just a guess and you maybe right - especially since the monastery is inside the "dangerous" world while Entrana is a bit excluded and travel there is controlled by the monks. Maybe entrana might allow PvP, but no armor/weapons like it is now so it could be a sorf of Boxing island? if they do then fletchers will own entrana, seriously. You can take bow strings, unstrung bows, tanned hides, arrow tips shafts. Pretty much everything a fletcher needs