If it is not a requirement to listen the safety briefing why make an issue out of it when a passenger chooses not to. All seems very handed. It would appear the passenger was causing no problems to anyone. Just allow the flight to proceed normally
Firstly if reports were correct and the pax was sat an an exit row then her not listening to the brief potentially could have caused major problems for quiet a few people...the offloaded passenger was not the only person on that aircraft that had rights.....
Secondly if individuals really feel they need to exercise " their right" to ignore safety briefings brief, in total, then just perhaps they should consider booking a window seat away from an exit row.
That way everybodies rights are respected.