I've said it before and I'll say it again, people that pirate a game were not going to buy it anyway.
Consider it "clock-tower tax". These people that weren't going to buy the game now have some entertainment, to keep some of them from realizing their life sucks, they hate everything and everyone, climb a clock-tower and kill everyone in sight. That's worth the 500+ million they made right? Greedy bastards. And yes, I work for a software company, and don't care people pirate software I helped make, they sincerely weren't going to buy the damn thing. Who cares, penalizing the actual market with DRM is just BS!
MW2 is just garbage imo, its just not that different from the first one, which wasn't that great for me anyway.
Software is an infinite resource once it's been made. Its can be replicated by anyone, and redistributed. There is no "loss" only the absence of profit to the developer. Most "loss" that these companies pull out of there ass is speculation. This isn't bootleg copies being sold on the street, while it exists, they are not selling 4.1m copies.