Why have I been Banned?

Before you bug me, Yes, I tried the search bar. Now to my point. I booted up Reach this morning to find out that a temporary credits ban has been placed on my account and all accounts on my console. I have not broken any rules that I know of. Yesterday, a friend was over, and she played in matchmaking with me. She was absolutely horrible, and averaged 0 kills per game, while she was killed many times each game. I’ve read that this can be considered boosting if the guest is inactive, but she was very active; merely horrible. What possible reason could they have had for banning me?
EDIT: I would also like to know how long this ‘temporary ban’ will last, if anyone knows.

Please post your question or review the feedback located in this thread: Why Did I Get Bannded?: The Official Thread

Not to bug, but it really is at the top of the Reach Forum in the form of a sticky :wink:

^this. Chances are you got banned because your friend was considered to be inactive, as you said.

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I (J Taps11) was suspended for saying Welcome on Roll Call and my Daughter (Squankooh) Was Banned for saying Welcome Spartan, they called it Spam. how petty can someone get.