Quote Originally Posted by ejburke View Post
It's not all about cheating. Microsoft doesn't want to provide any means of putting outside intellectual property into their game. Which is just ridiculous when you consider that none of the other big PC developers seem to worry about it.

There's a very frustrating Gametrailers .com Bonus Round interview with Aaron Greenberg of Microsoft (Live team) that backs this up.
Apparently, the shorter the EULA they have to type, the better for them. :/