Well, its the same as when not in an Invasion. At all times, Invasion and not, share information. This is a game based on text-interaction. Which doesn't happen when you don't share information. It's like complaining about your feet hurting while you shoot them off.
A better analogy is "complaining that it hurts running into a wall after blindfolding yourself". Your analogy just involved hurting yourself, while mine involves hurting yourself because you took away one of your own senses. Gotta make sure your analogies are properly parallel.
