You are totally missing my point. I'm not saying that some clubs don't have noisier fans than others. I'm saying that if clubs create a lot of noise with no roof then they would create even more noise with the addition of a roof especially if it is covering all the fans and leaning down to enclose the fans like at Brentford or in the Kempton.
What is ridiculous, if you look at that stadium, is the SAG said one reason away fans couldn't be moved to the Upper West was it was so steep it would be dangerous because if people stood up there could be a surge and people would go tumbling into the Lower West. Look,at the way they are carrying on in a three decker stadium with much steeper sloping with no problems.