I am a computer geek through and through and I love this show. Whats not to like about a Ferrari 458 driving down an airport runway at top speed trying to match pace with a jet airliner buzzing the airfield at close to stall speed so they can hook up a network cable and obtain critical software.
Sure its not realistic (starting with the fact that they would never install software on something critical like an air traffic control tower if there was even the slightest chance it could cause problems) but that doesn't mean its not entertaining...