Picture, if you will, enterring a game with two others. Imagine that there are 3 AI along with you, to fight wave after wave of incoming hostile wings.
Now imagine that after every wave is defeated, one of the wingmen send a message to all users:
"Arr! Damnit! Stop stealing my kills!"
Now, imagine you ignore that, and proceed. You kill a horus fighter. Suddenly an Erinyes rams into you, and there's another message from your wingman:
"Damn AI! That was mine!"
Now, imagine that the Erinyes rams you one more time, and you get fed up, and chase the Erinyes in your Ptah class fighter, and give it an ass full of Tempest missiles.
That's what playing FS2 multi is like with Cobra.