XBox Live Accounts Banned - 600,000 of them

16.  Service Operation and Equipment.

The Service may only be accessed with an original Xbox, an Xbox 360 console, a personal computer, or other device authorized by us, or by logging into your account via Xbox.com .  You agree that you are using only authorized software and hardware to access the Service, that your software and hardware have not been modified in any unauthorized way (e.g., through unauthorized repairs, unauthorized upgrades, or unauthorized downloads), and that we have the right to send data , applications or other content to any software or hardware that you are using to access the Service for the express purpose of detecting an unauthorized modification.  Any attempt to disassemble, decompile, create derivative works of, reverse engineer, modify, further sublicense, distribute, or use for other purposes the Service, any game , application, or other content available or accessible through the Service, or any hardware or software associated with the Service or with an original Xbox or Xbox 360 console is strictly prohibited and may result in cancellation of your account and/or your ability to access the Service, and the pursuit of other legal remedies by Microsoft.  Microsoft may take any legal action it deems appropriate against users who violate Microsoft's systems or network security ,this contract or any additional terms incorporated or referenced in this contract, and such users may also incur criminal or civil liability.

Microsoft reserves complete and sole discretion with respect to the operation of the Service.  Microsoft may, among other things: (a) restrict or limit access to the Service; (b) retrieve information from the original Xbox, Xbox 360 console, personal computer, and any connected peripheral device used to log onto the Service as necessary to operate and protect the security of the Service, and to enforce this contract; and (c) upgrade, modify, withdraw, suspend, or discontinue any functionality or feature of the Service, any game or other content available or accessible through the Service, or any hardware or software associated with the Service or with an original Xbox or Xbox 360 console, or personal computer, from time to time without notice, which may involve the automatic download of related software directly to your original Xbox, Xbox 360 console, or personal computer, including software that prevents you from accessing the Service, playing pirated games, or using unauthorized hardware peripheral devices.