Assuming that we all believe that all men are born equal then it follows that all fans of all teams are equal too. What I am saying is that supporting one team or another cannot possibly make you a better fan. However, it's certainly true that at some grounds a higher percentage of fans join in the chants and obviously that leads to more noise. Why is that? I think it's the chant itself. Off the top of my head, and having been at Wembley yesterday, I can think of two of the type of chant I'm thinking about, 'when the saints/spurs go marching in' and 'liv-er-pool, liver-er-pool', both are low effort, simple drones but very, very effective. Because they are slow and low effort many more people join in. I think we need a similar simple but effective chant that the whole ground can join in and can be sung for a couple of minutes. So simple and repetitive but catchy enough to get in your head.