Don’t boo at the referee because he gives a decision which you think is wrong. He has his opinion as to what happened, and his opinion is surely worth as much as yours.
Don’t make yourself a nuisance to those around you by continually bellowing at the top of your voice, it gets on peoples nerves and takes away a lot of the enjoyment of the game, besides making yourself look ridiculous. Don’t snap your neighbours nose off because he thinks differently to you. You have come to see your side win, and he has perhaps come to see the others.