The APPLE COMPUTER visitor was running not Mac OS X, but Windows. And not Vista, but Windows XP. And their browser? Not the new Safari for Windows, but Firefox. Do you think Apple knows that a "Firefox" has gotten into the henhouse?
Above: The Win XP/Firefox user caught red-handed.
Update: The prior version of this post said the visitor was running NT. That was due to a combination of sleep deprivation, carelessness, and the NT 5.1 designation next to the Firefox detail. Mark, in the comments, noted my mistake.