I too have seen the violence and disturbance that can follow screening of TV sport, particularly football. However, there is a distinction to be made between screening of events where all the audience supports one side only, eg Scotland or England vs A N Other and between events where the "audience" is split, eg Celtic vs Rangers. In the same way a distinction can and should be made between rowdy "Irish" nights, often an excuse for drunkeness and nights wehere there are either sessions in a pub or an artist doing a pub gig. To my mind for people who are not involved in or have no real contact with live music (not necessarily just folk music) don't make the above distinction and we all suffer from ignorance as a result.