1. There is no benefit to leaking 1/2 of a game.
2. They literally have no way of knowing who downloads it.
3. I can't seem to find this so called leak on any reputable torrent site, so it sounds like bullshit to me.
4. Why would anyone bother pirating this game, which will surely be a complete piece of junk.
I thought there could be a 5th point... but I was wrong. Either way. No much can be done with this leak. I love how they have blown this out of proportion already. At least wait till people can download and illegally play an actual copy of the game before you go hunting. I hate Activision. Knocking on doors indeed. What do they propose exactly? They can't do anything to anyone without evidence. And, "I think this person may have illegally downloaded my game", probably won't stand in court. Good luck.