There was 1 lady on the plane that should have been dealt with that disrupted the whole back section of the plane during most of the 10 hour flight. I know that the attendants tried to take care of the issue but they either need more authority or security on the plane to take care of such people that try to take other people's seats and then fight with everyone loudly, and then to top it all off puts her hands on other people. This problem was not solved on the plane and I fear it will happen again.