Crabby, the only defence I can think of to offer having seen the video, is the crew did not have enough experience to recognise they had already gone too far before turning around.....if indeed that is what they did.
Use a little common sense. Hover taxiing in fog along a public road in peacetime close to cars carrying families was, is, and never will be acceptable no matter what uniform we wear.
You are wondering if I am really a pilot. Hmmmm. Are you now suggesting that to be a pilot I must try to kill myself in fog? I am confused.