“When the news broke about it being impossible to use Linux as a
screen name on the Xbox 360 it sounded like such a Microsoft thing
to do. Alas, the real reason why you can’t use Linux as a screen
name is much more mundane.“The news that you couldn’t use, oh say, ‘Linux Rules’ as a
screen name on the Xbox 360 online gaming circuit appears to have
first appeared on Xbox Scene News. After that, the story spread
like wildfire as Xbox 360 users tried it for themselves. Their
attempts were met by the error message ‘Your motto contains
inappropriate language. Please try again…'”
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Unix,
Linux Keywords Banned from Xbox Live(Sep 04, 2007)