I do not necessarily mean the parental controls in OS X, but control by a parent (me) in general. I have a son who is challenging, to say the least. After putting parental controls in effect on the MacBook Pro he uses, I found he was on YouTube trying to find ways to get administrator privileges on the Mac. He found several videos on YouTube which purport to tell him how. I want to block him from command line usage so he cannot try to circumvent the security and controls in place. How can I accomplish this?