If you want to be mad at someone, be mad at Microsoft. Exclusive deals aren't done just because a developer likes one console more than the other. At the end of the day it's almost always about money. For the misinformed or misguided, these deals usually go down after a bidding war. Unless a developer has a previous business agreement with Microsoft or Sony, both companies have a chance to get an exclusive deal. I know people think Bungie hates Xbox or whatever but thats simply not the case. Whatever happened with Halo more than likely just opened the door for Sony to step in. Think logically. If you're angry with a buisness partner, you don't resolve it by attacking your own potential customers and loyal fans.