The very reason I go to a game is to show passion and support for my team. If I wanted to quietly sit there, looking at my phone and texting every 2 minutes well these days I could sit at home in front of my computer and watch the match. Yes some go over the top but that is what support is about, have you ever shouted abuse at a referee who got a decision wrong ? have you never sworn at a match when your player is scythed down as he runs towards goal ?
Why do fans sing before the match and before the team come out onto the pitch, why do they sing in the bar at half time ? the players cant hear them so what is the point ? It is about being part of something and if we make everything so sterile there really will be nobody watching, apart that is half and half scarf wearing tourists taking selfies and buggering off after 65 minutes becasue they have to take in the next attraction before their flight leaves.