I experienced something like this on a SAS flight from Sweden. A very attractive young lady sitting next to me at the back of a MD80 was bashing away on her laptop. being nosy and bored I couldn't help looking at what she was doing and, from some of her e mails I gathered that she was a stroppy, arrogant young lady.
As we started our approach into LHR she was asked to put her laptop away but carried on typing until she was asked a second time. She then got up and went to the toilet and, as far as I remember, we were down to about 1500' before she returned and strapped in.
Petty of me really but, as I got in front of her to disembark, I walked down the aisle very slowly and ensured that she was the last passenger to get off, a long way behind the rest. She didn't say a word.