The one Moral of the story...if anyone ever tells you they are too busy or too important to have a safety brief, then tell them they can call a taxi, because they wont be getting on your aircraft.
There is another moral...
The behaviour of the police was totally normal. I have witnessed exactly the same in various incidents and I guess that is just the way they do things. I am not judging or moralising, but my advice to anyone caught up in similar circumstances is keep your gob shut (irrespective of the type of caution) until your brief arrives.