If it really is as free for all as you describe, then the game is destined to fail. Average players aren't going to participate in a game world where griefing is rampant and without average players no game can survive. In a game where accountability is nil, 9 times out of 10 players will prefer to screw each other over than be symbiotic. These types of games usually experience a mass exodus very soon after release because of human nature.
In spite of that, it still sounds boring to me. I'm not a fan of open world DayZ style games.