Facing Entire Guild in GA

Strategy should be changed up based on the opponent's roster so it shouldn't always be the same anyway. Anyone can check out someone's roster and figure out which teams they have available and it's not too hard to predict which ones will be on offense or defense. And how do you know they wrote down your teams and strategy and shared it with other guild members? Seems doubtful that people log all that information every GA just in case someone else in their guild faces that person sometime down the road.