It may not mean much to you, but he‘s talking about getting access to communications systems and even some level of controls within the plane itself. And if that doesn‘t scare you, it should. It scared the feds, too, but it didn‘t scare them into actually, you know, addressing the security concerns. But it did scare them enough that upon the plane landing Roberts was scooped up by the FBI, questioned for several hours, and had his encrypted computer, tablet, and drives snatched from him. No warrant for any of this, mind you, at least not at the time of this writing.