Not to mention that ARMA is not cod or bf. Those have the same scenarios going over and over and over. ARMA is VERY different and not all servers or missions pit players against players. Every server that runs something different is basicly a game within this game. You can't go around screaming nerf this, buff that like it is a run of the mill console kiddie shooter.
Like it was said before, the mission designers and server admins control many of the parameters for the particular mission or game type running on a server at any given time.