Ethical hacking.. reminds me of a quote from Clifford Stoll's the Cuckoos Egg:

The word "hacker" has two very different meanings. The people I knew who called themselves hackers were software wizards who managed to creatively program their way out of tight corners. They knew all the nooks and crannies of the operating system. Not dull software engineers who put in forty hours a week, but creative programmers who can't leave the computer until the machine's satisfied. A hacker identifies with the computer, knowing it like a friend.