http://www.xbox.com/en-US/legal/LiveTOU.htm
In addition, your use of the Service is subject to your compliance with the Code of Conduct (www.xbox.com/en-us/live/codeofconduct.htm and its successors). You agree that we may also discontinue your access to the Service if you do any of the following while connected to the Service:
Create a Gamertag , avatar or use text in other profile fields that may offend other members. This includes comments that look, sound like, stand for, hint at, abbreviate, or insinuate or relate to any of the following: profane words/phrases, topics or content of a sexual nature, hate speech (including but not limited to racial, ethnic, or religious slurs), illegal drugs/controlled substances, or illegal activities;
There you have it. Right in the TOS. /Thread
