ABGirl, my thoughts indeed. Most people tend to think you enter the aircraft, get busy, fire up, taxi, fly approach, taxi and shutdown all in one go.
It simply is not that efficient.
Why shouldn't I be talking private issues while we are sitting out a 2 hour delay, or while we are in cruise? Of course, there are times you should keep all conversations purely professional, but since we don't have smokingrooms, canteens, bars etc on board our aircraft there is only a limited amount of areas where you can engage in social dialog. Certainly if you're only 2 on the flightdeck.
And why the paranoia against abuse by management? Because often they have proven to be ruthless beyond anyones imagination if they had someone on their hitlist.