This CP. All too common. People believe they can act with impunity up until the point they are faced with being caught/hard evidence etc. My favourite example is where on several occasions I have drawn up alongside people at traffic lights where they have been using their mobile phone whilst driving. The inevitable exchange goes like this.
Me "Excuse me, can you put your phone down please?"
Reply "What the f*ck has it got to do with you? F*ck off."
Me "I'm a police officer, and you're breaking the law." (Shows warrant card.)
Reply "Sorry, didn't realise you're a policeman."
Me " It shouldn't matter who I am, you're endangering me and other road users. "
There is a very real perception amongst young people that I come across time and time again, and that is as long as you can get away with it you haven't done anything wrong. If anyone sees you doing wrong only people in authority can do anything about it, and if anyone in authority sees you doing wrong they must prove that you have done wrong to absolutely everybody, beyond all doubt. If you tell your parents and friends that you did nothing wrong they will side with you and then you can then continue to claim innocence whilst drawing everybody's attention to what a b****** that person in authority is.
I see that unfolding with this particularly unpleasant woman in this incident.