Just another view on this..we have a team called Östersund in sweden(currently leading a group in the europa league)..they never haunted other teams and always cheer on their own team(despite if they play good or bad)must be pretty unique unless some japanese teams do it since they are so polite..cant say i have never myself sang songs about the other team or players trying to get them out of focus, but it can also be lightning fluid for the other team and turn games around.. whatever we do, we have nuno and everton got BFS