At the end of the day, it's just a videogame. Nothing of value was gained or lost from this leak. I don't see it as a security problem anyone needs to go out of their way to solve with radio isotope signatures or retinal scans.

Sure, Microsoft's PR cycle for Reach just took a slight hit, because they can no longer dole out every measured morsel of information leading up to the release in order to generate maximum hype and secure optimal levels of pre-orders. Boo hoo for them.

And sure, if any of this leaked stuff gets cut, Bungie will be held accountable by fanboys for some impassioned, poorly thought-out reason or another. But ultimately, this information is unimportant.