The problem is all seater stadiums, when the gobby kids all congregated in one area with no crumblies to dilute their "passion" they were happy and it meant there were areas that fans who wanted to actually watch the game could sit in reasonable comfort without being molested by the beery farty noisy anti social herberts.
Now they're all mixed up together and just piss each other off. Stadiums are big enough to accommodate everyone's idiosyncrasies there is no need for fans to tell other fans how to enjoy their Saturday afternoon