I'm not sure whether this is a glitch or a correct use of the feature, but I seem to be muted for the entire website. Assuming it's the latter, feel free to ignore this (hell, it's ignored by default), but otherwise I figured I'd report the issue.
If it helps, I recently appealed a ban. Might be a glitch in the appeal system.
Edit: http://www.bungie.net/en-us/Forum/Post?id=60258736
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Wow, if it's true that is a completely idiotic system easily abused. I thought these incompetents would have learned from Reach. OP, if it happens again I hope you get around it as I would. Message me if you don't know how.