This is a simple 'black and white' ethical case. He didn't have approval for the services and resources he consumed, he knew it was wrong (he purposefully avoided security), and he could have resolved any "gray area" at any time by simply asking permission. QED.
There's quite a bit of debate and philosophy on moral relativism, too. Which is the rhetorical baseball bat you're trying to apply here.
There's quite a bit of debate and philosophy on moral relativism, too. Which is the rhetorical baseball bat you're trying to apply here.